Learning Resources Hydrophonics LabGet a 360 view of growing plants from the roots up! Unique, transparent seed baskets provide a view of seedlings growing both up and down. Water in the plastic tubes creates an amazing, magnified view of the roots. Includes three test tubes, three seed baskets, three stands with wipe clean surface for easy labelling and Activity Guide. Durable, shatterproof plastic tubes measure 4cm x 18cm.