The Extension Remedial Game is made to improve finger extension in a fun way. It's a two sided board which means there are two games. One is checkers and the other is a solitaire jumping game. The hook and loop playing surfaces give desired resistance and engage the finger in position for active extension. The board is a laminated press board. Top is non-porous, sides are porous. Would recommend cleaning with a disinfectant spray. The blocks are a painted wood. The blocks could be sprayed with any kind of disinfectant too.