Have them collect all those crayons and take the paper off and separate into similar colors, we had to break many of them into smaller pieces (I think the girls enjoyed this part the best) :)
I used a mini muffin tin.
Put in a pre-heated oven 250degrees for about 10-15+ minutes, just until the crayons have melted through.
Pull out of the oven, allowing it to cool off for several moments before putting them into the freezer for about an hour.
When the wax has hardened, pop them right out!
And clean-up is simple! Pour hot water over the remaining wax pieces and wipe off.
Enjoy this special time with your little ones!