1. One egg carton (don't use a cardboard one - it won't work).
2. A Styrofoam cup (the kind used for holding hot drinks).
3. A Styrofoam block (you can buy this at any craft, or 'Do-it-yourself' shop).
4. A large drinking straw.
5. Four paper-clips.
6. A pencil and some string.
7. A pair of scissors.