I LOVE pinterest and get tons of great ideas for the classroom.I found this cute printable and had to do it with the children. They all had fun guessing how many conversation hearts will fit in the heart. Most of the children guesses 3, 4, or 5, but I had a couple guess 10. It ended up that 12-14 hearts would fit. Of course the best part came at the end, they got to eat them.