The Exclusive Nut & Bolts Construction Builders set by Constructive Playthings will encourage your budding carpenter or engineer to build and learn more about basic tools. Featuring plastic nuts, bolts, wrench, wheels, pre-punched assorted pieces and more, this set exercises creativity and is based on STEM principles including science and engineering. Constructive Playthings toys' play principles provide real benefits to child's learning, from improved hand-eye coordination to enhanced problem-solving skills. They also stimulate some of the most important parts of your child's development such as creativity and imagination. This 316 piece builder set comes in a variety of bright primary colors – red, blue, green and yellow. It can be stored in the included storage tub with locking lid and handles. It is an ideal addition to classrooms, preschools, and the home environment. It can be cleaned with a mild soap and water mixture and a soft, damp cloth. For children ages 3 years +.