Polystyrene balls in assorted sizes suitable for use in construction, collage, Christmas crafts or as armatures for modelling | 4 inch in diameter | Creating an Armature using a Polyshape (deco foam)- Armatures are like a skeleton. They are used to create structure before a more refined surface is applied | Step One - Attach Poly shapes together using a Toothpick. Use Supertac on both ends to secure | Step Two - Use a Satay Stick to poke holes in the Poly shape. Insert wire into the holes and secure with masking tape | Step Three - Cover the armature with a thin layer of Magiclay and add detail | You can also make armatures from Poly Shapes and Cardboard. Secure the shapes together using Masking Tape | Ideal for ages 5 and above