One sheet of construction paper for each color
A bean bag or a pair of rolled up socks will do
Lay colored construction paper on the floor in two rows. Let the child toss the bean bag on a color. Ask them to name the color and then name 3 things that are that color outside or in the house.
After the game let the construction paper be the pages of a book about colors. The child can get old magazines and find things of each color and cut them out and paste them on the correct page.