First it's a challenging assembly project, then it's a real pinball machine to play again and again. 482-piece wooden set has precision-cut pieces and sturdy mortise and tenon joints. Decorated with a retro circus theme, this machine features a core rebound mechanism and infrared sensor to keep score. No batteries or extra tools needed. USB cord included. 12-hour assembly time. 10.8"W x 18.7"L x 11"H.