Do this only for the fore legs. Fold the leg up, then mountain fold like the picture. Then valley fold the leg. If you open the back of the leg, there should be three layers on it. You the second and the third and do a crimp-fold. Then inside crimp-fold the legs. Repeat on the other side. Squash fold to form the wings. The rear legs are quiet the same with the fore legs, just without the crimp-fold. Well, you can balance it later, but if you want to it doesn't matter.