A fun idea I've been seeing a lot of recently for childrens birthday cakes is a 3D cake.
I've seen instructions on using different types of pans to create different shapes, but I think sometimes it might be easier to create your template of what shape you would like for your alligator, and then cut large sheet cakes into that shape.
I especially like this being a girl alligator, don't you? She's not so sinister - maybe it is the eyelashes! :-)
Show us your great birthday cake and tell us how you did it!