1. A balloon (any colour!).
2. An old tray, such as a tea-tray.
3. Some wallpaper paste and water. You can buy wallpaper paste from any hardware store.
4. Some sticky tape, glue and a pair of scissors.
5. Lots of old newspapers.
6. A cardboard egg box (it doesn't matter for how many eggs: you'll only use part of it).
7. About one metre of elastic.
8. Some paint and paintbrushes. Poster paint or acrylic paint is best.
9. Some cotton wool.