Have your child draw identical pictures of the front of your house or apartment building on all three cards. Have your child include any front walkways, trees, or shrubs.
Go outside on a clear night. Face your home and look at the sky. On one of the index cards, have your child draw the stars and the moon as they appear in the night sky.
Draw the sky again, on the second index card, an hour later. Draw it again, on the third card, another hour later.
Ask your child: