Vintage String Pipe: a loop of string projects upward pushed by air flow-the result is a mix of projectile motion and viscous fluid flow in this vintage toy from the 1970s. The string is multicolored which adds to the visual effect. Before there was motorized string shooters (Zipstring, String Thing) these where sold in the cheap plastic toy sections of convenience stores- fun! ➡️ Follow the link in my profile for info on where to buy the amazing items featured here on @physicsfun #kineticenergy