Simple machines [kit].

Published: Vernon Hills, Ill. : Learning Resources, Inc., [between 2000 and 2009?]
Physical Description: 4 red and 3 blue bases, 4 large pillars, 2 small pillars, 2 5g block and hook, 2 10g block and hook, 4 red and 4 blue large pulley wheels, 4 blue small pulley wheels, 2 red axle holders, 6 blue eye axles, 3 grey bolts, 3 grey nuts, 1 grey insert piece, 1 grey wedge, 9 grey connector axles, 8 rubber bands, 1 guide (18 pages : illustrations ; 28 cm.) ; in box 25 x 38 x11
Additional Creators: Learning Resources (Firm)