4M Crystal Growing Experiment This science kit contains all the materials needed to perform seven different crystal growth experiments. A special display case is included to admire the crystals once they are fully grown. Perfect for young science enthusiasts, especially those with an interest in geology. Complete instructions for each experiment are included with the kit. Recommended for ages 10 years and up. Challenge your child's imagination with 4M toys and kits. 4M educational toys cover a wide range of educational subjects and include science kits, arts and crafts kits, robotics kits, and more. 4M offers a wide range of toys and kits to let you build a clock, crochet a placemat, or turn your room into a planetarium--all in the name of making learning fun.