THE PHILADELPHIA GROUP-Amazing Science Kits: Grow Your Own Crystal Tree. Turn a paper tree into a crystal tree in just 24 hours! This kit has everything you need to grow one crystal tree: one plastic base, one paper tree, one packet of magical crystal solution, and an instruction sheet. Recommended for ages 8 and up. WARNING: CHOKING HAZARD-Small Parts. Not for children under 3 years. This set contains chemicals that may be harmful if misused. Adult supervision required. Imported.