How do pulleys work? Is one pulley as effective as two? Can you lift your own weight? Children will experiment with a single and two pulley systems as them lift themselves up using their own strength.     Discovery Questions: How do pulleys work? Are four ropes as effective as five?           © 2008 Children’s Museum Of The Desert Phone 760-321-0602 FAX 760-321-1605 71-701 Gerald Ford Drive, Rancho Mirage, CA 92270 Privacy Policy, Hours of Operation, Admission and Directions, Membership, cdminfo@cdmod.org