Toy Themed Rolling Marble Sculpture: marbles perform gymnastics as potential energy of gravity is converted to kinetic energy. This festive FAO Schwarz branded marble run features two powered conveyers including an Archimedean screw inside the toy rocket (one AAA battery and a small motor for each). Found and repaired this one from a local thrift store. ➡️ Follow the link in my profile for info on where to get rolling marble toys and other amazing items featured here on @physicsfun #physicstoy #