4m deluxe crystal growing combo steam science kit. Create your own stunning crystal collection! Follow simple steps to grow over 10 crystals including a glow-in-the-dark crystal and 2 geode pairs. 4m steam-powered kids science kits introduce them to science, technology, engineering, art and math. Explore stem and steam concepts with a diy stunning crystal collection kit grow more than 10 vibrant crystals in assorted colors and textures including a glow-in-the-dark crystal and 2 crystal geode each colorful crystal is unique and will reach full size in 7 to 10 days by following the detailed instructions 4m deluxe crystal science kit includes materials for 1 large crystal, 3 medium crystals, 4 small crystals, 1 glow-in-the-dark crystal and 2 crystal geodesrecommended for age 10 years and up Recommended Ages: 10 Years And Up Measurements: 2.5 Length/Inches Base Material: 100% Plastic 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.