There are 86 pieces included - screws, bolts, wingnuts, wheels, and perforated plates, made of resistant shatterproof plastic, which can be assembled without the need for special tools. All a child needs is their hands and they’re imagination. And when playtime is over, everything fits back into the handy toolbox for storage. The box has a handle and a cover that can be used as a base for playing on. This building toy stimulates coordination as well as logic and creativity, helping children to understand basic principles of mechanics while enjoying themselves. Comes with 24 x bi-dimensional threaded pieces, 14 x 3 dimensional threaded pieces, 46 x screws, bolts and washers and an instruction booklet with 5 building examples. Suits ages 3 years +.