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Subtraction
AS PLAYERS' SKILLS GROW – Build observation skills by finding matches by color and shape
and minerals from rainbow-flecked crystal opal to metallic gold radial pyrite
Alien Robots Engineering Makerspace
post-tests
Light-Up Rock & Gem Collection Wooden Trains SubtractionLight Up Rock & Gem Collection Get the stone cold facts on rocks! Packed with 29 unique rocks, gems, and minerals, this is the perfect kit to start or expand a rock collection. Build a color changing light up display with an agate slice: use it as a lamp, or study the stones up close with the included magnifying glass. Learn fun facts about each rock in the fully colored 32 page book including 6 experiments and activities with easy to find ingredients
