It Really Works: Thrill your curious kids with this motorized mini engine kit. They get to build a realistic 6-cylinder motor, power it up & watch it run – with moving pistons, spinning fans & more. Over 320 Premium Parts: Forget cheaply made model kits with missing parts. This complete engine model kit gives kids everything they need from start to finish. Just add 3 AA batteries & you’re set. Amazing Special Effects: Simply press the button & presto: Your DIY engine model will start mimicking the air-fuel combustion process – complete with flashing LED lights & roaring engine sounds. Makes Science Fun: As your kids build this model engine, they’ll develop critical thinking & mechanical skills. Plus, they’ll learn all about combustion engines from the detailed included workbook. Built to Last, Beautifully Boxed & Backed by Our 30-Day Warranty: Crafted of high-impact ABS plastic, this durable mini engine can stand up to tons of wear. Comes in a big, bright box for easy gifting.