K'NEX Education STEM Explorations: Roller Coaster Building Set $29 at Amazon $29 $45 Amazon has the K'NEX Education STEM Explorations: Roller Coaster Building Set on sale for $29 with free shipping. 546 parts, includes battery-powered motor. Requires two AA batteries (not included). $29 retail: $45 Report Posted by Faraday03/07/2023 at 01:44 PM PT
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