Here's a simple and fun memory game!
Gather some random toys or objects from around the house and lay them out on the floor (or on a cookie sheet). Allow your child to study them for a minute or so, depending on their age and attention span.
Have your child run out of the room (or close their eyes- we opted for running out of the room to work off some wiggles). While they aren't looking remove one of the displayed item. Can your child tell what's missing?