PC Mad Scientist's Bag: Alum Crystal Board Game

The Alum Crystal set from the "PC Őrült tudós táskája" range is a home experiment kit that lets you and your child explore chemistry together. The focus is growing crystals from alum, a salt that dissolves in warm water and forms crystals as the solution cools and evaporates.

Alum crystals are colourless and non-toxic. Larger pieces resemble diamonds, although they are much softer. The included instructions walk you through the process step by step: warm tap water is saturated with alum in a jam jar, the solution is covered overnight, and the next day it is poured into a clean jar so the first small crystals can grow into larger ones.

Patience is the key ingredient. Hang a crystal from a string into the liquid without letting it touch the glass, and the real growth begins. It is a practical project that builds curiosity and perseverance at the same time.