so the pattern on each pair will be different

USB cable length: 120cm

Light color: red

Product Series: Body Series

Brand: Kuiying

Pocket Remote Control Helicopter – Crash-resistant Fingertip Flyer for Kids, RC Toys Baby Store so the pattern on eachProduct Information: Ability Training: Emotional Development, Intellectual Development, Hand Eye Coordination, Interactive Play, Parent Child Communication, and Interest Development Color Options: Mini Helicopter White 3. 5 Channel, Mini Helicopter Yellow 3. 5 Channel, Mini Helicopter Red 3. 5 Channel, Mini Helicopter White Fixed Height All in One, Mini Helicopter Yellow Fixed Height All in One, Mini Helicopter Red Fixed Height All in One, Large Fixed