National Geographic - Dueling Tornadoes

With National Geographic's Dueling Tornadoes kit discover how air pressure, the power of a vortex, and the collision of masses of air combine to create powerful storms as you create your own tornado in a bottle! 

• Amazing gift: This is a great gift for girls and boys who have a love of science and hands-on exploration
• Approximate Packaging Dimensions: 14 x 22 x 3 cm
• Contents: two bottle connectors and a mini learning guide!
• Ages 6+