Here is a very simple Ben 10 cake to do for all the Ben 10 fans. My kid just loves Ben 10 and so he was very happy with his birthday cake. You have to make a round cake. I then covered the cake with white sugar paste and used it as base for my decorations. I used some food colour to colour the sugar paste according to my needs.
I cut some star shapes in black and green and put them on the cake. I did the figure of Ben 10 sitting on the cake and I also put some aliens around the cake. Of course they are made of sugar paste. I also did the Omnitrix on top of the cake.