Features: brand new and high quality Automatic Wooden Marble Machine: Non toxic and natural plywood sheets. Battery powered (not included). Multiple Ways to Play: This marble run wood mechanical model kit will bring you highly satisfying and educational user experience. Elaborate Structure Design: Full of well-designed mechanisms and small tricks, like funnel type rotary acceleration device, swinging ball separator, etc. System Project: Favorable to learn fundamental of engineering, improve kids' hand-eye coordination. Decent Gift for Adults and Teens: It’s a decent gift for parents & friends. Also, use it as home decoration or for play in the office. Specifications: Material: Wood, the wire is made of stainless steel. Dimensions: 11x7.5 for cm/4.3x3 inch (estimated) Color: Available in natural colors only. Please understand that the actual color of the final product may vary slightly from the photos; every piece of wood is different. Package Includes: 1 Set Mini Wooden Marble Machine note: Due to manual measurement, please allow 1~2cm difference, please don'for t mind before bidding. Due to the difference in light and screen, the color of the product may be slightly different from the picture; Please read and consider carefully before shopping. Thanks for your understanding.