Wood material,eco-friendly and non-,safe for use,Let the child understand how the robotic arm works,Cultivate children's ability to use both hands and brain,Allows children to experience the fun of DIY. Features: 1. Scientific experiment kit, exercise children's practical ability; 2. DIY small toys cultivate innovative ability. Note: Shipped in pieces; does not include 2 AA batteries Radio module color is random, don't accept the specified color Color: Wood color Material: Wood + Electronic Components Package Contents: 1 Set * DIY FM Radio Model Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.