Electric Wind-Force Car Physics Experiment DIY Assembly Model Material Kit Early Education Assemble Model Kit for School Project Description: Exercise children's hands-on ability, understand the simple mechanical principle knowledge. Log material, you can give full play to imagination; free graffiti, create a toy of your own. Specification: Material: plastic, wood, metal Size: 12.5*8*7cm / 4.9*3.1*2.8in Color: as shown Recommended age: over 5 years old Pay Attention: When assembling the products, the red wire connects to the positive pole of the battery box and the blue wire connects to the negative pole of the battery box. All products do not carry batteries, pigment or glue; accessories color is random; do not specify the color. Please read carefully before buying. Contains small accessories and sharp objects. Children should be accompanied by adults. Please take care of children and avoid from swallowing. Note: 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! Please allow 1-3cm measuring deviation due to manual measurement. Included: 1 X DIY Model Toy Materials Kit