Go exploring! With the Explore water filter, children can discover science and nature. Water from the pond or ditch: it can all go through the 6-piece water filter. Assemble the 6-piece water filter together and watch as the water flows through the different layers of the filter. The pebbles, sand, and carbon filter the water step by step! This way, coarse twigs and impurities are removed from the water. This educational STEM toy will filter the collected water and result in a clear end result! Contents • 6-piece water filter • Granite pebbles (20g) • Porcelain sand (20g) • Activated carbon (15g) • Instructions Suitable for children aged 8 and up.