He asked for cupcakes instead of a cake and for a Yo Gabba Gabba theme. Thinking something along these lines with fondant character faces - maybe not such a large topper though?
Hah! Exactly what i had in mind. Now to buy a REALLY big round icing tip so there are no piping lines...
Like the simplicity of these toppers but the frosting is his favorite part so don't want to do away with it!