Hmmmmm...

Somewhere...there is a book--booklet, actually--of activities for adults to do with children and I believe there is a volcano recipe in it. I bought it for Leu's DS and DDIL when their children were younger--then discovered her DDIL's idea of doing things with her children was to send them off to a play group while she shopped!

I'll look for it tonight, but I might not find it until the next snow fall--next winter.