I am doing a buzz lightyear / megatron (from transformers) cake... the two characters are fighting eachother on the top of the cake which is gonna be a moon... but I have this " round cake that the moon is sitting on... and I have no idea how to decorate it... does anyone have any ideas... my only thought is to make it blue with green bits of land, so it looks like the earth... but any other ideas would really help.

thanks in advance.

I would make it look like space. Have it dark blue or black with stars, shooting stars, etc. Maybe even a small earth on it somewhere.