This is an activity I really like. Asia Ward developed the idea for workshops to introduce simple LED circuits. A simple light source - LED, battery and a switch to turn it on and off. To make them you'll need some materials:

• Recycled Tea boxes (the most common size but any tagboard package boxes will work its just that the tea boxes keep the size small and the material needs low)

• Bright colored paper

• Card stock, in different colors - also called cover stock or pasteboard, (make sure you have some dark colors )sheets and scraps

• Cereal box cardboard sheets and scraps

• Foam-core or Cardboard cut into little pieces about 1/4"x1/2" ( these will be used as spaces to create "grounds" fore, middle and back ground

• colored acetate scraps

• LED's - 8 and 10mm of different colors

• 3V button batteries

• Battery holders or DIY versions of holders (small binder clips + foam-core scraps)

• Thin solid core or stranded insulated wire

Some tools:

• Scissors

• x-acto knives