We love edible math around here...I mean, who doesn't, right? So I gave my just-turned-3-year-old a bowl of fruity-O's and some plastic lacing cord, the length of a necklace, and invited her to make a necklace. After finding lots of reasons to eat them before stringing them (this one's broken, I'll have to eat it; these two are stuck together - I'll have to eat them) she got to it and strung about 25 cereals. I tied a knot at the open end and showed her how to slide the loops down to the end as she counted. She let me do about two of them and then told me to "Stop, Mommy! It's my turn!"