View growing plants from the roots up! This set of three growing tubes is a great way to explore hydroponics. The clear tubes provide a close-up look of growing seedlings through the transparent seed basket. The tubes also offer a write and clean surface for labels. The kit includes three shatterproof plastic test tubes (1¾ in diameter x 7" high), three stands, three support rod tops and three support rod bottoms, three seed baskets, and an activity guide. Recommended for ages 5 through 11.