Fun Assembling-This set DIY creative assembling toys includes excavators, road rollers, soil drills, and bulldozers. 4 engineering vehicles can be assembled freely. Use the attached screw tool to disassemble and assemble the engineering vehicles. Explore the fun of assembling In the process, cultivate concentration, exercise childrens hands-on ability and thinking ability, and transform into hands-on little masters. Construction toys for Kids age 2-4, lets become little engineers together Creative Thinking-This toy car for kids age 3 4 5 can be disassembled anytime, anywhere, so that children can use their hands and brains. By assembling the construction vehicle, it promotes thinking and logic. The cute construction vehicle shape, the 4 construction vehicles have their own strengths, Excavation, bulldozing and transportation, etc., can simulate the operation of the project, let children experience the joy of project construction, and bring children a world of fantastic ideas. Learn \u0026 Playing-Children can recognize the colors and the name and purpose of the engineering vehicle during the playing process, which is very suitable for assembling games or small competitions with friends. Different types of vehicles can interchange the body and free assembling parts.Guide the children to assemble the engineering vehicle. At the same time teach the kids related knowledge, stimulate the childs interest and promote the relationship with the child. Safety Material-This kids toy car uses environmentally friendly high-quality ABS materials, without any peculiar smell. The high-strength car body with thickened material is more sturdy and playable. The round and smooth shape, no burrs, does not hurt the childrens hands, and can be easily twisted the screw .Use the inertial power to slide without installing a battery.It is a toy car for boys age 2-5 years old that allows children to enjoy themselves and parents to rest assured. Surprise Gift -A DIY construction gift for 2 3 4 boys and girls. It is an ideal gift for children in the golden age of childrens thinking development. A small decision allows children to have a lot of gains. It is specially designed for children aged 1-5. Holiday birthday gift. Lets lead the children to open the door to a new world together