Step 15: Assemble The Legs
To assemble part 40 start by gluing the bottom strip around a few flaps as in the fourth picture. Now glue the skinny strips on each side to the nearest tabs (5th picture).
Take one of the triangular prisms (like part 33) made last step and glue them in place as in the sixth picture. part 31 is there to help the alignment, it should be able to freely rotate around part 33. When the one side is dry glue the other side in place. Make sure the upper leg is oriented so it curves up from the bottom, like in picture 6.
Finish the lower leg by gluing the remaining flaps down (pictures 8-10).
To make the foot, start by folding up the sides and gluing down the two shorter sides. Glue down the other two sides and then the top flap.
To finish the leg glue the foot to the lower leg following the guidelines, make sure the slot in the bottom of the foot runs parallel with the direction of the leg.
Repeat this process to make the second leg from parts 37-41.