Find out where your children's favorite activities can be found in the new city. Also, describe other advantages of the new location such as a zoo, theatre or an amusement park. The Internet is a great resource for information. Remember, your attitude will affect your children. If you maintain a positive outlook, it will be easier for your children to adapt.
Young children are more resilient than older kids.
But that doesn't mean it's easy. Keep explanations clear and simple. When you pack toys, make sure your toddler understands that you aren't throwing them away. Also, this isn't the time to replace your small child's bedroom furniture. Instead, keep familiar objects and arrange them in a similar pattern to the child's old room.