I bought this for my son for his last birthday, it says from age 3 but it is really small so I would recommend this from age 2(ish) if your child is ready for a scooter, it was quickly outgrown so passed on to my younger, smaller niece.
It is fun, the lovely little detachable bag was a hit too. It is study and can withstand uneven pavements well. The footplate is big enough for two feet(just) for when you child gets tired.
Over all a fun, durable scooter, but i would say too small for the average 3 year old.