3 years & up. The Hand Operated Bike was designed by pediatric professionals that understand every child has unique needs and preferences. Utilizing their extensive experience with children, Bintiva built a line of inclusive, developmental products that focus on sensory, balance, and strengthening equipment. Not only is the Hand Operated Bike fun, it is also beneficial for child development. The Hand Operated Bike can be used to increase body strength through the exercise of upper body muscle groups; providing cardio benefits, resulting in better health. Ideal for kids with height of 33" - 53". Weight max - 110 lbs. Hand Operated Bike measures 15"H x 29"L x 18"W.