I colored them different colors and wrote the name of each color on the jar, then laminated them so we could use them several different times.
I bought a bag of jelly beans and poured them in a bowl and gave Jake and Cate each their own mason jar printables.
Cate (2 y/o) had her sort the colors and she also did some counting.
Jake (4 y/o) had him count and match to correct color. Then did some small math asking if I took or added blank # how many does that give him?
You can also use this as a fun busy bag game as well.
They both were really into this learning game.