This is the Da Vinci Clock from the Academy Hobby Models Da Vinci Machines Series. Suitable for Ages 14 & Older. FEATURES: Clock is base on the escapement sketched by Leonardo da Vinci Uses the pendulum's weight as its power source Power is harnessed from a horizontal rotary pendulum design Clock speed is controlled by adjusting the weight and balance the pendulum Assemble as either a wall mounted or stnading configuration No glue or paint required Pictoral instructions