Learning Resources Spike the Fine Motor Hedgehog Rainbow Stackers. Stack up Early Years skills with this new Spike the Fine Motor Hedgehog set. The 5 puzzle-style stacking cups help young children with colour and shape identification skills. Build Spike horizontally or vertically or take the stacking cups to the bathtub for fun water play. Includes multilingual packaging and Activity Guide. Measures 8cm H x 14cm L. 6 Piece Set.