Made By Me Glow in the Dark Powerballs by Horizon Group USA ILLUMINATE YOUR CHEMISTRY EXPERIENCE: Mixix simple ingredients, including glow-in-the dark crystals and vibrant powders into a cool mold and watch the chemical Reaction take place to create a Super bouncy power ball HOURS OF PLAY TIME: Create endless hours of entertainment as you create games and group activities using the power balls you created EXPLORE YOUR CREATIVITY: Show your originality as you create unique designs GREAT GIFT: Great gift idea for creative and crafty kids who take pride in creating and enjoying their finished product DESIGN WITH EASE: Easy-to-follow instructions making assembly a breeze Kit Includes: 1 Round Mold, 1 Hexagon Mold, 16 Crystals  35.oz Each, 2 Glow-in-the-Dark Crystals - .35oz Each, Easy-to-Follow Instructions AGE RANGE: 6 years & up