LEGO Ideas Grand Piano 21323 contains 3,662 pieces and recreates a concert grand piano with moving mechanisms. Its 25 keys are individually connected to hammers that move towards the strings when pressed. It also features a moving pedal, damper, opening top lid with support stick and a Powered Up motor. Using the LEGO Powered Up app, it can be used in a manual performance mode, where the user presses the keys, or an automatic mode that plays one of four compositions. When closed, the model measures approximately 22.5 cm high, 30.5 cm wide and 35.5 cm deep.