4M: Crystal Growing Kit (Large)

My kids were glued to the kitchen counter watching the first crystals branch out after about 24 hours, and the seven different projects keep them coming back for more. The powder-to-crystal ratio is generous enough that we've already started a second batch without running short.

The instruction booklet was clear enough that my 9-year-old could follow along mostly on her own. We’ve already grown three different types of crystals, and watching them form over a few days was genuinely fascinating.

My son was thrilled to mix the chemicals and watch the first crystals form overnight, though a few of the smaller projects required more patience than he had. The variety of seven experiments is great for keeping him engaged across multiple afternoons.