Horrible Science- Creepy Crystals

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Grow a creepy crystal tree, create your own diamonds and make crystals that rock! Discover how crystals form and foul facts about crucial crystals. Contents: ammonium dihydrogen or thophosphate, tree growing solution, tree card, Petri-dish, colour tablet, seed crystal, round bottle, funnel, limestone rock and 'Horrible Info' leaflet. Suitable from 8 yrs+ Show more