Features: Made of natural wood, light and durable. It is odorless and safe for kids. Our kits make it easy for teachers and parents to provide kids with super fun and creative- learning activities! This model is composed of many pieces. It is a challenge to complete the whole model suite. A detailed description of each assembly step is attached, which is easy to understand and follow. A very good educational toy can help children develop their thinking creativity, hands-on ability, patience and attention. It can also be a family game. When you do Buildings together, it can strengthen the relationship between children and parents. This toy is especially suitable for people who like DIY Building crafts. This is an excellent gift for teenagers/adults/boys/girls/friends-/families. Specifications: Material: Wooden Size: Approx.13x8x9cm/5.12x3.15x3.54inch Package Includes: 1x DIY Password Box Kit- note: 1.Please allow 1-2cm errors due to manual measurement, make sure that you do not mind before you order. 2.Due to the differences between different monitors, the picture may not reflect the actual color of the item.