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Amazon.com: E-Blox Building Blocks STEM Circuit Kit, 120 Projects, Build Your Own Sound Machine & Radio, Build Real Working FM Radio & Listen to Favorite Station, Science, Birthday Gift, Boys, Girls, 8+ :
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Amazon.com: E-Blox Lite Blox STEM Builder Kit (30 Pieces), Colorful LED Lights, Building Blocks Toy Set, Great Science Project for Kids, Birthday Gift, Boys, Girls, 3+ : Toys & Games
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