Okay, don't panic. Go to a toy store and buy some Backyardigans figures. Take them into your local bakery/grocery store, pick out a cake design that would work with them, and ask the bakers to make it for you without the cake kit (ie, the plastic toys). Show them what you plan to put on it, and they'll take it from there. We've had to do that the last 3 years for DS1's birthday. For his 3rd it was firefighters, for his 4th he wanted tools, and for his 5th he wanted Mickey Mouse. That's another that you'd think would be easy to find, but the only one we could find was too girly.