20 Cool Birthday Cakes That Will Make Kids Squeal | TURTLE TREAT | Gisele Bündchen had no problem figuring out what her mini Teenage Mutant Ninja Turtles fan wanted for his fourth birthday cake. The model mom got son Benjamin a tortoise-friendly confection, complete with a Michelangelo doll holding nunchucks. "Our little angel is getting so big. Happy birthday my sweet Benny. We love you so much!" wrote Bündchen after posting a photo on Instagram of the fun dessert.