Step 1: Hands
We could only find 50mm polystyrene in time so everything was cut twice and stuck in pairs to make up the thickness. We drew a couple of circles and added the wrist to make a template then used a marker to outline them on polystyrene.
We used a padsaw to cut the polystyrene at first which worked really well to get the basic shape but wasn't the neatest. When we did the second pair of hands we used a junior hacksaw blade with small teeth that worked much better.