Plan Toy Nuts and Bolts come with two large bolts and six threaded geometric pieces. Arrange the pieces in many formats and screw them onto the bolts to form different designs. Children love the repetitive twisting motion of threading the pieces on the bolts. It is great for developing fine motor skills. 2 years & up. Build dexterity and strength in little fingers by encouraging children to use their imagination to create forms and figures. Assemble the nuts and bolts with various mixes and matches.