As with most the color games we've played this month, I got this one from The Toddler's Busy Book. This has been hands down her favorite game we have tried!! She played it 4 times in a row and asked to play it again, but it was lunch time. She seriously loved it and it was super cute seeing her concentration while trying to match up the colors.
You just paint a few rocks
Paint the inside of an egg carton
And let them match up the rocks with the colors in the egg carton