Get a 360° view of growing plants from the roots up! Ideal for science fair projects and at-home fun, this set of three transparent tubes is a no-soil, mess-free way to explore hydroponics with water or any other media. Includes 3 test tubes in stands with support rods and seed baskets .Activity guide. Durable, shatterproof plastic tubes measure 1.75" in diameter x 7"H each. Stands each measure 3.5"D x 3.25"W x 2.75"H and have a write-on/wipe-off surface. Supports STEM: Test and study effects of water-based plant growth.