Weight range is 8-26kgs....
My 4 year old daughter has one, and we just purchased my nearly 2 year old daughter one on the weekend.
Safest because unlike other booster seats, maxi riders have a teather strap tnhat attaches to tha anchor point in your car....
Never seen them in the big dept stores. I dont think im allowed to tell you where i got mine (BB rules ??) but try googling MAXI RIDER...that should point you in the right direction.