The volcano is carved funfetti and the planet is 11X15 chocolate. All frosted with buttercream and covered with ganache. The planet pieces are candy clay. Lava is melted canned frosting. The cake board is covered with printed fabric. I got most of my ideas here on CC, thanks to all who posted Mustafar cakes. You can't see in the pic, but his name is in candy letters on the edge of the board. I realize the characters on the cake are "wrong", but he picked them out and gave them to me for his cake.