Description: 1. [ CERTIFICATES ]: EN62115/EN71/ASTM/10P/CPSIA/CCC/UKCA EMC/EMC/CE/FCC-15 2. [ 175PCS ]:. This screw nut assembly toy contains 175 accessories, which can be assembled into 18 different shapes (18 can not be assembled at the same time). We have provided instructions to help children assemble smoothly. In the process of assembling, children not only exercise their mental intelligence, but also improve their hand eye coordination ability. This is mainly the assembly of engineering vehicles with different shapes. It is connected by screws and nuts. The whole is full of scientific and technological sense and mechanical sense, which satisfies the boys' enthusiasm for engineering machinery. 3. [ STORAGE BOX ]:  It is equipped with a storage box. After children play, they can store the remaining accessories to exercise the children's sorting awareness and storage ability. It is convenient to carry the cassettes. Children can bring toys to play with their friends to promote their social skills. 4. [ HELP FOR CHILDREN'S GROWTH ]: This high quality low price blocks building toy is a typical steam toy, which can help improve children's quality in science, technology, engineering, mathematics and art, and focus on cultivating children's science and technology literacy and problem-solving ability. This diy toys educational building blocks can help children improve the ability of hand-on and independent thinking, cultivate children's creation, promote their hand-eye coordination. Beside, this kids toy of intellectual building stacking blocks can increase parent-child interaction, parents can participate in the process of children assembling toys, increase parent-child communication and enhance parent-child feelings. 5. [ IDEAL GIFT ]: This toys is a ideal gift for your son, dauther, grandson, granddauther, niece nephew etc. to as birthday gift, school gift, christmas gift, daily surprise gift and so on. 6. [ OEM & ODM ]: Hanye toy company welcomes customized orders. The minimum order quantity and price of customized orders can be negotiated. You are welcome to inquire. I hope our products can contribute to your market opening or expansion. 7. [ SAMPLE AVAILABLE ]: We support customers to buy a small amount of samples (or free sample --- need to contact us to confirm whether free samples are currently supported and pay the freight before we send the samples) to test the quality. We support trial orders. Customers can test the market with a small order here. If the market responds well and the sales volume is large enough, the price can be negotiated. We look forward to cooperating with you.