Just ordered one of these for my 9 year old son. These are the prepacked versions that adidas pull together but exactly the same as the replica kits you would buy off the hanger.
You'll need to use the 15% off link to get this price and with delivery (£4.50) you're looking at just over 20 quid, which is still excellent value for a full kit.
Sizes available were from 2-6 and 10-14 (age that is).
Also had the same offer on the boxed blue away kit, but there were not as many sizes available.