Clementoni Science & Play Lab: Grow Your Own Crystals STEM Set - MPN: 61559

This kit is designed for children aged 6 years and up.

The kit contains alum (aluminium and potassium sulfate) which is used to grow the crystals.

Yes, hot water is typically used to dissolve the alum powder effectively, creating a supersaturated solution necessary for crystal growth.

Crystal growth can take several hours to a few days, depending on the conditions such as temperature and evaporation rate. Patience is key!

The crystals grown from alum are generally safe to touch once dry, but it's recommended that children handle them gently due to their fragility. Adult supervision is advised.

The provided alum powder is for the experiments described. Once dissolved in water, it cannot be effectively recovered and reused for subsequent crystal growing experiments without re-purification.

Science experiments can have variable results. If crystals don't form as expected, review the instructions and troubleshooting tips. It's a learning opportunity to understand the factors affecting crystal growth.

Ensure the alum was fully dissolved in hot water. The water may need to be hotter, or more alum may need to be added until no more dissolves (supersaturated solution). Also, check if the solution was disturbed during the growing process.

This can be due to a solution that wasn't fully saturated, or the evaporation rate was too fast. Try using a slightly cooler water temperature for dissolution and a location with less air circulation for slower evaporation.

Ensure the string is properly suspended and not touching the container. Scratching the string slightly can provide nucleation sites for crystal growth. Avoid adding impurities to the solution.