Grades 4 and up. Students can construct, examine and explain simple machines to develop a deeper understanding of how they work. Modify machines with weights or rubber bands to explore effort, force and more. Includes 63 pieces and activity guide.
To calculate the overall star rating and percentage breakdown by star, we don’t use a simple average. Instead, our system considers things like how recent a review is and if the reviewer bought the item on Amazon. It also analyzes reviews to verify trustworthiness.