Features: Cultivate awareness: Exercise your child's hands-on skills and understand simple mechanical principles. Log wood color, you can use your imagination, graffiti freely, create a toy of your own. Specifications: Material: Paper Size: 8.5 * 6.5 * 5cm/3.35*2.56*1.97" Color: as shown Recommended age: 5 years and older Note: When assembling products that require circuits, note that the red wire is connected to the battery box positive; the blue wire is connected to the battery box negative. All products have no battery, no pigment, no glue, and the color of the accessories is random. No color is specified. Please read carefully before buying. Contains small accessories and sharp objects, children need to be accompanied by adults, please take care of children to avoid swallowing. Notes: 1. Due to the different monitor and light effect, the actual color of the item might be slightly different from the color showed on the pictures. Thank you! 2. Please allow 1-3cm measuring deviation due to manual measurement. Included: 1 Set X DIY Wooden Hand Cranked Generator Toy