Unlock the mysteries of common rocks with the toysmith rock science kit. The rock science kit teaches how to test, classify and identify different kinds of rocks. The kit includes fifteen (15) rock specimens, plus a magnifying viewer and a handy identification guide. Perfect for young science enthusiasts, especially those with an interest in geology. A plastic storage tray keeps the rock collection together when not in use. For ages 8 and up. # Pieces In Set: 18 Number of Batteries: 3 Recommended Ages: 8 Years And Up Measurements: 7.5 Length/Inches Assembly: Assembled Base Material: 100% Plastic Battery Size: Aa 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.