1.ROYALBABY BIKE: 95% of the bike is assembled, leaving only the need to install the training wheels, pedals, handlebar and saddle. The packaging includes all necessary tools to finish the assembly. The bike can be put together very quickly and easily. 2.BICYCLES DESIGN: Unique square-tube frame with various fashionable colors. Safe and stable training wheel for early rider. Front handbrake and coaster brake. Adjustable bicycle handlebar and seat suitable for children of different heights. 3.SAFE CHILDREN BIKE: Safety grips, soft seat, sturdy steel frame, enclosed chainguard,crank, brakes,non-slip resin pedal. 1.2mm bike steel tubes thickness and 2.4'' wide tires, high quality accessories make bikes stronger and more durable. 4.BICYCLE ACCESSORIES: This beautiful bike for boys girls comes with a bell, a DIY decal, training wheels for 12/14/16 inch, kickstand for 16/18 inch, and bike front white reflector/rear red reflector. 5. RECOMMENDED SIZE: 12'' bike for 2-4 years toddler, 14" bike for 3-5 years children, 16" bike for 4-7 years, 18" bike for 5-9 years child. Note: child height may vary even at the same age, please take the height into consideration.