bursun kids bike helmet ventilation & adjustable toddler helmet for ages 2-14 kids boys girls multi-sport helmet for skateboard roller skateing bicycle scooter blance bike small: 18.9"-21.3" / 2-8 years blue-1 is up for auction in Sports & Outdoors. The current bid is $1.50, 95% below the $29.77 MSRP, in New/Like New condition. This auction has ended — similar items appear in live auctions regularly.