diff --git a/moto/ec2/models.py b/moto/ec2/models.py
index 3f3fc4491..19d005867 100644
--- a/moto/ec2/models.py
+++ b/moto/ec2/models.py
@@ -3,6 +3,7 @@ from __future__ import unicode_literals
 from collections import defaultdict
 import copy
 from datetime import datetime
+
 import itertools
 import re
 
@@ -97,6 +98,9 @@ from .utils import (
 )
 
 
+def utc_date_and_time():
+    return datetime.utcnow().strftime('%Y-%m-%dT%H:%M:%SZ')
+
 def validate_resource_ids(resource_ids):
     for resource_id in resource_ids:
         if not is_valid_resource_id(resource_id):
@@ -309,14 +313,17 @@ class Instance(BotoInstance, TaggedEC2Resource):
         in_ec2_classic = not bool(self.subnet_id)
         self.key_name = kwargs.get("key_name")
         self.source_dest_check = "true"
-        self.launch_time = datetime.utcnow().isoformat()
+        self.launch_time = utc_date_and_time()
         associate_public_ip = kwargs.get("associate_public_ip", False)
         if in_ec2_classic:
             # If we are in EC2-Classic, autoassign a public IP
             associate_public_ip = True
 
         self.block_device_mapping = BlockDeviceMapping()
-        self.block_device_mapping['/dev/sda1'] = BlockDeviceType(volume_id=random_volume_id())
+        # Default have an instance with root volume should you not wish to override with attach volume cmd.
+        # However this is a ghost volume and wont show up in get_all_volumes or snapshot-able.
+        self.block_device_mapping['/dev/sda1'] = BlockDeviceType(volume_id=random_volume_id(), status='attached',
+                                                                 attach_time=utc_date_and_time())
 
         amis = self.ec2_backend.describe_images(filters={'image-id': image_id})
         ami = amis[0] if amis else None
@@ -343,6 +350,10 @@ class Instance(BotoInstance, TaggedEC2Resource):
                        private_ip=kwargs.get("private_ip"),
                        associate_public_ip=associate_public_ip)
 
+    @property
+    def get_block_device_mapping(self):
+        return self.block_device_mapping.items()
+
     @property
     def private_ip(self):
         return self.nics[0].private_ip_address
@@ -1349,6 +1360,7 @@ class SecurityGroupIngress(object):
 class VolumeAttachment(object):
     def __init__(self, volume, instance, device):
         self.volume = volume
+        self.attach_time = utc_date_and_time()
         self.instance = instance
         self.device = device
 
@@ -1373,6 +1385,7 @@ class Volume(TaggedEC2Resource):
         self.id = volume_id
         self.size = size
         self.zone = zone
+        self.create_time = utc_date_and_time()
         self.attachment = None
         self.ec2_backend = ec2_backend
 
@@ -1404,6 +1417,7 @@ class Snapshot(TaggedEC2Resource):
         self.id = snapshot_id
         self.volume = volume
         self.description = description
+        self.start_time = utc_date_and_time()
         self.create_volume_permission_groups = set()
         self.ec2_backend = ec2_backend
 
@@ -1444,6 +1458,13 @@ class EBSBackend(object):
             return False
 
         volume.attachment = VolumeAttachment(volume, instance, device_path)
+        # Modify instance to capture mount of block device.
+        bdt = BlockDeviceType(volume_id=volume_id, status=volume.status, size=volume.size,
+                              attach_time=utc_date_and_time())
+        try:
+            instance.block_device_mapping[device_path] = bdt
+        except:
+            instance.block_device_mapping.setdefault(device_path, bdt)
         return volume.attachment
 
     def detach_volume(self, volume_id, instance_id, device_path):
diff --git a/moto/ec2/responses/elastic_block_store.py b/moto/ec2/responses/elastic_block_store.py
index 96586a9bb..abb371260 100644
--- a/moto/ec2/responses/elastic_block_store.py
+++ b/moto/ec2/responses/elastic_block_store.py
@@ -42,12 +42,22 @@ class ElasticBlockStore(BaseResponse):
         return DELETE_VOLUME_RESPONSE
 
     def describe_snapshots(self):
+        # querystring for multiple snapshotids results in SnapshotId.1, SnapshotId.2 etc
+        snapshot_ids = ','.join([','.join(s[1]) for s in self.querystring.items() if 'SnapshotId' in s[0]])
         snapshots = self.ec2_backend.describe_snapshots()
+        # Describe snapshots to handle filter on snapshot_ids
+        snapshots = [s for s in snapshots if s.id in snapshot_ids] if snapshot_ids else snapshots
+        # snapshots = self.ec2_backend.describe_snapshots()
         template = self.response_template(DESCRIBE_SNAPSHOTS_RESPONSE)
         return template.render(snapshots=snapshots)
 
     def describe_volumes(self):
+        # querystring for multiple volumeids results in VolumeId.1, VolumeId.2 etc
+        volume_ids = ','.join([','.join(v[1]) for v in self.querystring.items() if 'VolumeId' in v[0]])
         volumes = self.ec2_backend.describe_volumes()
+        # Describe volumes to handle filter on volume_ids
+        volumes = [v for v in volumes if v.id in volume_ids] if volume_ids else volumes
+        # volumes = self.ec2_backend.describe_volumes()
         template = self.response_template(DESCRIBE_VOLUMES_RESPONSE)
         return template.render(volumes=volumes)
 
@@ -103,7 +113,7 @@ CREATE_VOLUME_RESPONSE = """<CreateVolumeResponse xmlns="http://ec2.amazonaws.co
   <snapshotId/>
   <availabilityZone>{{ volume.zone.name }}</availabilityZone>
   <status>creating</status>
-  <createTime>2013-10-04T17:38:53.000Z</createTime>
+  <createTime>{{ volume.create_time}}</createTime>
   <volumeType>standard</volumeType>
 </CreateVolumeResponse>"""
 
@@ -117,7 +127,7 @@ DESCRIBE_VOLUMES_RESPONSE = """<DescribeVolumesResponse xmlns="http://ec2.amazon
              <snapshotId/>
              <availabilityZone>{{ volume.zone.name }}</availabilityZone>
              <status>{{ volume.status }}</status>
-             <createTime>2013-10-04T17:38:53.000Z</createTime>
+             <createTime>{{ volume.create_time}}</createTime>
              <attachmentSet>
                 {% if volume.attachment %}
                     <item>
@@ -125,7 +135,7 @@ DESCRIBE_VOLUMES_RESPONSE = """<DescribeVolumesResponse xmlns="http://ec2.amazon
                        <instanceId>{{ volume.attachment.instance.id }}</instanceId>
                        <device>{{ volume.attachment.device }}</device>
                        <status>attached</status>
-                       <attachTime>2013-10-04T17:38:53.000Z</attachTime>
+                       <attachTime>{{volume.attachment.attach_time}}</attachTime>
                        <deleteOnTermination>false</deleteOnTermination>
                     </item>
                 {% endif %}
@@ -157,7 +167,7 @@ ATTACHED_VOLUME_RESPONSE = """<AttachVolumeResponse xmlns="http://ec2.amazonaws.
   <instanceId>{{ attachment.instance.id }}</instanceId>
   <device>{{ attachment.device }}</device>
   <status>attaching</status>
-  <attachTime>2013-10-04T17:38:53.000Z</attachTime>
+  <attachTime>{{attachment.attach_time}}</attachTime>
 </AttachVolumeResponse>"""
 
 DETATCH_VOLUME_RESPONSE = """<DetachVolumeResponse xmlns="http://ec2.amazonaws.com/doc/2012-12-01/">
@@ -174,7 +184,7 @@ CREATE_SNAPSHOT_RESPONSE = """<CreateSnapshotResponse xmlns="http://ec2.amazonaw
   <snapshotId>{{ snapshot.id }}</snapshotId>
   <volumeId>{{ snapshot.volume.id }}</volumeId>
   <status>pending</status>
-  <startTime>2013-10-04T17:38:53.000Z</startTime>
+  <startTime>{{ snapshot.start_time}}</startTime>
   <progress>60%</progress>
   <ownerId>111122223333</ownerId>
   <volumeSize>{{ snapshot.volume.size }}</volumeSize>
@@ -189,7 +199,7 @@ DESCRIBE_SNAPSHOTS_RESPONSE = """<DescribeSnapshotsResponse xmlns="http://ec2.am
              <snapshotId>{{ snapshot.id }}</snapshotId>
              <volumeId>{{ snapshot.volume.id }}</volumeId>
              <status>pending</status>
-             <startTime>2013-10-04T17:38:53.000Z</startTime>
+             <startTime>{{ snapshot.start_time}}</startTime>
              <progress>30%</progress>
              <ownerId>111122223333</ownerId>
              <volumeSize>{{ snapshot.volume.size }}</volumeSize>
diff --git a/moto/ec2/responses/instances.py b/moto/ec2/responses/instances.py
index f36480237..8689aa3a8 100644
--- a/moto/ec2/responses/instances.py
+++ b/moto/ec2/responses/instances.py
@@ -206,7 +206,7 @@ EC2_RUN_INSTANCES = """<RunInstancesResponse xmlns="http://ec2.amazonaws.com/doc
           <instanceType>{{ instance.instance_type }}</instanceType>
           <launchTime>{{ instance.launch_time }}</launchTime>
           <placement>
-            <availabilityZone>us-east-1b</availabilityZone>
+            <availabilityZone>{{ instance.placement}}</availabilityZone>
             <groupName/>
             <tenancy>default</tenancy>
           </placement>
@@ -331,7 +331,7 @@ EC2_DESCRIBE_INSTANCES = """<DescribeInstancesResponse xmlns='http://ec2.amazona
                     <instanceType>{{ instance.instance_type }}</instanceType>
                     <launchTime>{{ instance.launch_time }}</launchTime>
                     <placement>
-                      <availabilityZone>us-west-2a</availabilityZone>
+                      <availabilityZone>{{ instance.placement }}</availabilityZone>
                       <groupName/>
                       <tenancy>default</tenancy>
                     </placement>
@@ -369,15 +369,18 @@ EC2_DESCRIBE_INSTANCES = """<DescribeInstancesResponse xmlns='http://ec2.amazona
                     <rootDeviceType>ebs</rootDeviceType>
                     <rootDeviceName>/dev/sda1</rootDeviceName>
                     <blockDeviceMapping>
+                        {% for device_name,deviceobject in instance.get_block_device_mapping %}
                       <item>
-                        <deviceName>/dev/sda1</deviceName>
+                         <deviceName>{{ device_name }}</deviceName>
                           <ebs>
-                            <volumeId>{{ instance.block_device_mapping['/dev/sda1'].volume_id }}</volumeId>
-                            <status>attached</status>
-                            <attachTime>2015-01-01T00:00:00.000Z</attachTime>
-                            <deleteOnTermination>true</deleteOnTermination>
+                             <volumeId>{{ deviceobject.volume_id }}</volumeId>
+                             <status>{{ deviceobject.status }}</status>
+                             <attachTime>{{ deviceobject.attach_time }}</attachTime>
+                             <deleteOnTermination>{{ deviceobject.delete_on_termination }}</deleteOnTermination>
+                             <size>{{deviceobject.size}}</size>
                         </ebs>
                       </item>
+			            {% endfor %}
                     </blockDeviceMapping>
                     <virtualizationType>{{ instance.virtualization_type }}</virtualizationType>
                     <clientToken>ABCDE1234567890123</clientToken>
@@ -547,7 +550,7 @@ EC2_INSTANCE_STATUS = """<?xml version="1.0" encoding="UTF-8"?>
       {% for instance in instances %}
         <item>
             <instanceId>{{ instance.id }}</instanceId>
-            <availabilityZone>us-east-1d</availabilityZone>
+            <availabilityZone>{{ instance.placement }}</availabilityZone>
             <instanceState>
                 <code>{{ instance.state_code }}</code>
                 <name>{{ instance.state }}</name>