Connex is a series of educational science kits that provide useful knowledge about simple physics. Smartly designed, each Connex kit allows kids to snap the pieces together with ease and breeze. Simply snap all key components and modules together to start and pull apart once finished. It encourages kids to experiment on their own for additional learning. Best of all, each kit can snap to another to integrate functions and double (triple, quadruple) the fun! Learn about alternative energy sources such as salt water with the Connex Salt-Water Engine. Connect the kit with the supplied instructions, fill the salt water holder, hit the switch, and watch as the fan turns on. Your kids will be amazed to see that the fan is powered by salt water. Inspire your kids to find alternate sources of energy and create a greener world. Features: - Includes complete kit with instructions - Build your own scientific salt-water fan - Understand how salt-water triggers the engine - Requires 1 x AA battery (when not using salt water), not included - Suitable for children ages 8 years and older