K.H.
When my ds turned two we made a car cake I found in a magaazine. All you need is one standard round cake pan, make cake according to directions. Then when its cooled and ready cut the cake in half and turn it on its side so it looks like the body of a vw bug. We iced it, stuck on oreo cookies ofr the wheels, different color icing designed into windows, fruit loops for headlights and taillights. You can use your imagination with different candies for different parts of the car but you get the idea, it was a huge hit and was pretty easy, the best part was that I didn';t have to buy one of the expensive fancy shaped cake pans to make it. YOu could try kaboose.com and familyfun.com for more cake ideas.
Good luck and Happy Birthday to your little one.