Feature: 1. Strengthen the cooperation between disciplines, give full play to the comprehensive education function. 2. Let students learn in a comprehensive environment, and apply the knowledge of multiple disciplines to solve problems in project activities. 3. Small in size, easy to store and carry, can improve children's creativity and practical ability, but also cultivate children's patience 4. Children can enjoy the fun when playing with the unfinished toy building blocks. Science experiment toys, exercise children's practical ability. 5. Wooden materials are environmentally friendly, non‑toxic and safe to use, cultivate the ability of using their hands and brains, and experience the fun of DIY. Specification: Item Type: DIY Excavator Model Material: Plastic + metal elements + composite wood Size: Approx. 15 x 11 x 1cm / 5.9 x 4.3 x 0.4in Suitable Age: Above 4 Years Old Usage: 1. Place the 2pcs large blocks in order 2. Take 2pcs #2 block and fix on the back with 4pcs screw 3. Take #3 and #4 block and assembly 4. Take a small syringe on the block and cover with another 3# block, use the same method with small syringe and assembly with #5, and #6 block 5. Take #7 and #8 block and 2pcs screw assembly 6. Take #9 and #10 block and install on both sides with 4pcs screw 7. Take two syringe cartridges and inject 8ml of water into them without leaving any air 8. Install the two hoses firmly on the syringe and push the water inside the syringe into the hose to drain the air inside the hose 9. Connect the two syringe sizes through the hose respectively according to step 5 10. Fix both ends with iron shaft through the shaft sleeve at the hole position 11. Take the #13 block and another small syringe and fix them with iron shaft and shaft sleeve 12. Connect the lower small syringe to the #13 block and fix it with iron shaft and sleeve 13. Fix it with iron shaft and shaft sleeve according to step 6 14. Connect the small syringe at the top according to step 12 15. Take #12 block for assembly and fix it with screws at both ends 16. Completed assembly . Package List: 2 x Large Syringe2 x Small Syringe2 x Plastic Water Pipe 2 x Block 2 x Water Pipe Cable Tie 12 x Silicone Gasket 1 x Bag of Screw Accessory 1 x Screwdriver