Thames and Kosmos Crystal Growing 230 you’ll find spacious rooms for

you’ll find spacious rooms for the whole family

Sarah can climb back up the ladder into the tree house

and physical science principles related to water and air

sending out sound waves

Thames and Kosmos Crystal Growing 230 you’ll find spacious rooms forGrow dozens of dazzling crystals and conduct 15 illuminating experiments with this classic science kit. Experiment with four chemically different crystals each with different properties, including potassium alum crystals that form regular octahedrons, rapidly growing sodium sulfate crystals, long needle shaped sodium acetate crystals, and plaster which is made from gypsum crystals. Mold fun plaster shapes, including stars, lightning bolts, dolphins,