The kit demonstrates how the water is purified by building a filtration system.
The kit includes:
- 3 x 65 g gravel;
- 3 x 65 g of sand;
- 3 x 90 g activated charcoal;
- 12 x 60 mm filter paper;
- measuring cup 50 ml;
- Safety glasses.
Dimensions: 20.5 x 15.5 x 6 cm.
