Adept Family brand bikes are made of quality lightweight aluminum alloy parts making them lighter and easier to handle for small children. Make learning to bike and performing on a bike much more fun and efficient for your little one with our quality products. A 30 pound chunk of steel bike may save money . but the extra investment in a quality product that is less than half the weight is a much better value (about 13 pounds). This model has 16 inch wheels and frame . is good for 4 to 7 year olds and can work for 3 year old that is tall. Training Wheels are included (not recommended) . Sturdy Kickstand . Water Bottle holder and Water Bottle . Coaster Brakes . Riser Style Children’s Handlebars . no cables. This bike is as maintenance-free as possible likely only needing air pressure in the tires and possibly occasional chain lube. Assembly is a breeze with only a few steps as it comes nearly completely assembled. Tools are included with the bike and the owner’s manual will have a link to an assembly video. Assembly takes approximately 15 minutes (which is likely easier/faster than going to a store and waiting in a checkout line). For boys and girls . unisex.