In this video, John Park takes you through all the steps of building a Gakken Karakuri somersault doll. You can purchase the doll, but the instructions come in Japanese and not English. It's a good think John's here to help you out! You'll have the somersault doll built in no time at all!
Oh... and if you're working from home these days, be sure to check out Gadget Hacks' Working-From-Home Essentials.