Grow a big beautiful crystal and assemble a special platform to display it with a color-changing LED circuit inside. Learn about crystal formation and LED technology. Features: - Age: 8 years and older - 4 different experiments encourage kids to learn - Grow your own golf-ball-sized crystal out of potassium aluminium sulfate - Learn about the chemistry of crystal formation and the physics of light and colour - Get familiar with circuitry by building the colour-changing LED light - Batteries: 2 AA batteries (not included) - puzzle pieces (1) Contents: - Die-cut black cardboard - Plastic base with lid - Transparent plastic cone - Colour-changing LED - 2 contact springs - 2 black screws - 2 silver screws - Black wire with eyelet and contact latch - Double contact latch - Switch with eyelet and contact latch - 2 50 gram packages of potassium aluminium sulfate powder - Safety goggles - 125 millilitre measuring cup - Wooden spatula - Wooden stick - Instruction booklet Directions for use: - To be used under the direct supervision of an adult