Grow your own glow-in-the-dark crystal with this easy-to-use kit. Get started immediately with this kit that includes everything to grow beautiful crystals that glow in the dark. Learn about crystal formation with this fun and luminous chemistry experiment. Use under adult supervision only for safe crystal growing. This kit is recommended for ages 10 and up # Pieces In Set: 6 Recommended Ages: 10 Years And Up Measurements: 7 Length/Inches Assembly: Assembled Base Material: 100% Plastic Care: Wipe Clean Country of Origin: Imported p.p1 {margin: 0.0px 0.0px 0.0px 0.0px; font: 15.0px Calibri; -webkit-text-stroke: #000000} span.s1 {font-kerning: none} WARNING: CHOKING HAZARD – small parts. Not for children under 3 years.