happyxuan diy roler science הנדסה ערכות בנייה ערכות עץ צעצוע קיטור ילדים צעצועים חינוכיים יצירתיים בית ספר פרויקטים

DIY Road Roller Science Engineering Construction Kits Wood STEAM Toy Kids Creative Educational Toys School Projects

Material: wood Product size:8*16*11 cm (3.15*6.30*4.33 inches) Suitable age: over 5 years old Knowledge: The road roller, also known as the compactor, is a road repairing device. The road roller belongs to the category of road equipment in construction machinery. It is widely used in the filling and compacting of large-scale projects such as high-grade roads, railways, airport runways, dams, and stadiums. It can crush sand, semi-stick and sticky soil. Subgrade stabilized soil and asphalt concrete pavement layer. The roller is applied by the gravity of the machine itself and is suitable for various compaction operations so that the pressed layer is permanently deformed and compacted. Note: the price is for 1 set. The batteries are not included.

Material list：

Product detail：