A ratchet is a mechanical device that allows continuous linear or rotary motion in only one direction while preventing motion in the opposite direction. Though something of a misnomer ""ratchet"" is also often used to refer to ratcheting socket wrenches a common tool with a ratcheting handle A ratchet consists of a round gear (see Figure 1) or linear rack with teeth and a pivoting springloaded finger called a pawl (or click[1]) that engages the teeth. The teeth are uniform but asymmetrical with each tooth having a moderate slope on one edge and a much steeper slope on the other edge. The Wooden Frog ratchet is made of rose wood and organic natural dye with round edges which is totally safe for kids it keeps your child busy and entertained. "