![Hiker filling a water bottle](/sites/default/files/2023-12/water-filter-header.jpg)
How can you design the least “expensive” water filter?
Hands-on Activities
Challenge yourself to design the best filter for the lowest cost!
![Image of a windmill with a cloudy sky in the background.](/sites/default/files/2023-12/windmill_header.jpg)
How could you design a wind-powered elevator?
Hands-on Activities
Design a device that uses the power of wind to lift a small object.