Photo 1 of Made By Me Glow The Dark Powerballs by Horizon Group USA, DIY STEM Kit. Make 18 Bouncy Crystal Power Balls, Molds and Instructions Included, Multicolored

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Photo 1 of Made By Me Glow The Dark Powerballs by Horizon Group USA, DIY STEM Kit. Make 18 Bouncy Crystal Power Balls, Molds and Instructions Included, Multicolored