Kid’s projects
I would just be zen about keeping it clean. They aren’t going to make masterpieces – a little devit isn’t going to distract from the gee wiz factor that comes from making something from glass 
We’ve done projects with schools before where each child gets a 3″ x 3″ piece of clear and a palette of 3 colors of frit and stringer (no sheet glass so no cutting). We fuse the tiles to a single piece of base glass and slump it into a large bowl or platter (which often gets auctioned off as a fundraiser). The amazing thing is that by having all the kids use the same small number of colors the final piece is gorgeous every time.
Paul
FusedGlass.Org
Helios Kiln Glass Studio
PaulTarlow.com
