I made this box to help our 2 year old learn his colors. You can do so many variations with this. I have made something similar for colors, letters, shapes, and numbers.
Cover the top of the box with white paper. I used tape but I think glue might be better?
then I taped construction paper rectangles on.
Then I cut out the holes. Be really careful. Watch your fingers.
Because the paper was not glued down, I had to put tape going into the hole to hold the paper down.
Then wrote the colors on it with a Sharpie.
Leave one side open so you can dump the pieces out and start over.
I have it to the kids with Magntiles and they both had a blast. My 6 year old loves helping/teaching. PomPoms, Legos, or anything else with colors would be fun too!