Salt Crystal Garden

A super-salty solution, a piece of string and a few days of patience – real crystals grow on the string.

Time: 20 min
Age: 5–12 years
Energy: Calm
Where: At home

As the water evaporates, the salt has nowhere to go and lines up into regular crystals. Watching them grow day by day through a magnifying glass amazes every kid.

The steps are in the app

Step-by-step instructions, tips and an easier and a harder version are waiting in the Hopsa app – along with 300 more ideas matched to your kids’ ages.

Join the waitlist

Coming soon to the App Store and Google Play

Similar activities

Bouncy Egg10 min · 5–12 years

Color-Changing Flowers15 min · 4–10 years

Dancing Raisins10 min · 3–9 years

Bean in a Jar15 min · 3–10 years

All play ideas →