Connetix Rainbow Ball Run Expansion Pack 66 pc CT-R-00066-BRDescription Take your ball run creations to a whole new level with whirling and twirling, unexpected diversions and double the fun! Featuring exclusively designed, clear, fluted tubes including Spiral, X, double bowl pieces, as well as vibrant rainbow connector square magnetic tiles and wooden balls, the CONNETIX 66 Piece Rainbow Ball Run Expansion Pack is sure to challenge your inner engineer to create bigger, more exciting designs. OPEN ENDED FUN