Walkie Talkie, Walkie Talkie Junior
How do you grow natural coloured crystals? How do you make instant crystals? How do you make phosphorescent crystals that glow in the dark?
25 experiments to grow crystals in every size, shape and colour. 9 crystal powders are provided to easily and safely grow them.
Experiments using a microwave for more speed and safety.
Instructions sheet in 6 languages.
Requires 2 LR06 batteries, …