Now, attach the two bases with another piece of cardboard, then add an eighth "leg", connect the helmet and face mask.
How much you add is your decision, here's a list of what I added:
A cross bar on the front
Attached all the legs to the base
Attached the legs together with cardboard
If you feel it isn't sturdy enough; add more. Remember, you should be able to sit on it, and place stuff on the face mask table.