Set of gear machinery

Material: plastic. Size: The largest is about 28×8.5cm, the smallest 2×2cm, and the operation card is 20×14cm. It contains 116 pieces of granular building blocks and 3 pieces of operation cards. You can DIY and easily assemble a variety of shapes, effectively give out whimsical ideas, and exercise your hands-on ability. At the same time, various tools can enable children to understand and pay attention to machinery and engineering in life, and understand related common sense.