K'NEX Education Stem Explorations: Gears Building Set Building Kit for $11.66 on Amazon

Amazon has got this 143-piece K'NEX Education Stem Explorations: Gears Building Set Building Kit for only $11.66 with free Prime shipping and free returns. It got 4.7 out of 5 stars over 107 customer reviews.

• The set includes 140+ parts for a single child or team of 2 children to build 3 unique geared models: a crank fan, a car window and an egg beater.
• Students will learn about gear configurations, gear ratios, rotational speed, mechanical advantage and more!
• The experiment guide is aligned to National STEM standards and is appropriate for Grade levels 3-5.