Galactic Blast VBS Cake

Today I made a "thank you" cake for my sons' teachers at Vacation Bible School. The kids had so much fun there, as they do every summer, and so we wanted to bake something special to thank all the great staff who make it possible. The theme for this VBS was "Galactic Blast!" My boys suggested that we copy the logo from their camp t-shirts and pipe it on a 14" round cake. The cake itself is golden vanilla and I colored the batter different bright colors with food coloring similar to the rainbow cupcakes featured on Family Fun. We are hoping that when they cut into it, they will be pleasantly surprised by the "blast" of color (pardon the pun)...