An exciting construction set using the Galt Marble Run to create fascinating chain reactions! Challenge yourself to build a chain of fun obstacles for your marbles. Watch your marble swirl around the vortex, send paddle wheels spinning, knock over dominoes and jump from drum to drum to raise the finish flag! Includes 34 tubes, 10 bases, starter top, vortex, ramp, support bar, rope swing, paddle board, spiral base, chute, curve, paddle wheel, paddle wheel chute, slalom, domino track, 4 dominoes, 2 drum bases, 2 drum covers, marble catcher, finish, flag, 7 marbles, chain reaction ideas sheet and guide. 4 years +