DIY Glitter Magnets - an easy craft idea for kids too. J in the Library's note: Though glitter is almost guaranteed to be messy, this is a relatively easy project that would only take 2 library classes, or 2 meetings of a maker club.
pre-heat the oven to put broken crayon pieces in a mini cupcake mold (either use paper cups or spray mold with vegetable oil). "cook" mold for about 10 minutes; they melt very fast. remove from the oven and let cool completely.
Bowls made of confetti! Great recycling art project--save all those leftover paper scraps (put in small bowls at each table). Collect a bunch and have the kids cut them up; Then make bowls made from confetti.