For my son's second birthday, I decided to make him a bulldozer cake (okay, actually it's a loader, but the kid is two and he doesn't always understand the difference). I was super, super happy with the way this turned out! It's only the second decorated cake I've ever made (the first was a train for his first birthday). It's all edible, right down to the "dirt." The hardest part for me to figure out was the track, and as you can see we ended up going with Hershey's bars. It's a plain vanilla cake mix with regular decorator's frosting (my mom's recipe that she's been using since I was little).
C & C welcome!