Connetix Rainbow Ball Run Expansion Pack (66 pc)Take your Rainbow Ball Run creations to a whole new level with whirling and twirling, unexpected diversions and double the fun! Featuring new, exclusively designed Spiral, X and double bowl pieces, this expansion pack is sure to challenge your inner engineer to create bigger, more exciting designs. This open ended expansion pack includes connector square magnetic tiles, wooden balls, plus a range of clear, fluted tubes to allow you to explore motion