Description: 【Package】The package includes 2 base stands, 5 round wooden rods, 2 single sided slotted bridge panels, 4 double sided slotted bridge panels, 4 two mouth slot wooden rods, and 6 slot wooden rods, everything your child needs to build their own bridge. 【Material】: The Wooden educational arch bridge toy is made of wood, which is environmentally friendly, and durable to use. 【Design】: Wooden playset arch bridge science kits use mortise and tenon construction is an ancient woodworking technique that does not require the use of any nails or glue, it is simply fixed by the concave and convex fit between the wooden pieces. This design allows children to understand and learn about this unique construction technique while having fun. 【Educational】: 3d puzzle bridge can help children improve their spatial perception, logical thinking, and hand eye coordination. At the same time, it can also develop children's creativity and imagination, allowing them to learn and grow while playing. 【Gift】: Diy wooden toy assembled bridge model is the ideal gift for kids on birthdays, and holidays.  Size Chart: 11cmx22cmx5.5cm/4.33inchx8.66inchx2.17inch Package Includes: 2 Base Stands 5 Round Wooden Rods 2 Single Sided Slotted Bridge Panels 4 Double Sided Slotted Bridge Panels 4 Two Mouth Slot Wooden Rods 6 Slot Wooden Rods Note: 1.This is not infant toy, please take away from children to avoid eating. 2.Please allow slightly errors due to manual measurement and different monitors.