Toysmith X-Stream X-5 Glider Glide through air and water with this Dynamic Natural Propulsion (DNP) glider. Fly farther and longer with the internal wing design which captures energy not utilized by conventional wing designs. Covert buoyancy to thrust with DNP for effortless gliding through water. All of the parts are made of safe, high quality materials. This toy is recommended for ages 5 years and up. Challenge your children's imaginations and keep them active with Toysmith. Committed to providing the most imaginative toys along with the highest safety standards, Toysmith has toys appropriate for all age groups. Toysmith offers toys for any kind of play: active play, science and discovery, arts and crafts, impulse and novelty toys, and nostalgic retro classics. The Internal Wing Aircraft was invented by Robert Carr to capture the energy wasted by conventional wings When the air passes through the unique wing configuration nearly all of the energy is used and creates the phenomenon that we have called the Dynamic Natural Propulsion This effect also works in water converting buoyancy to thrust 4 assorted colors 5-Inch power-launched glider