You've chosen the right place, WWW.Hayaltd.co.uk, Andrew knows his stuff and you can e-mail him with questions and he will respond quickly. I agree with CapitanB, unless your going to be outside metal tracks are out, that is what there made for, outside. Do yourself a favor and start with the basic tank, good indoor driver and even patio and driveways are ok. If your son enjoys it you can the add metal gearboxes and metal tracks and sprockets later, these upgrades are a great way to work and get to know tanking.Nothing worse than L400.00 just sitting on a self. Keep in mind the T-90 has ALOT of parts that YOU have to put on the tank from sprues. Take a look at the Challenger 2 or Leopard 2A6, a lot less parts AND a bigger if not the biggest HL tanks made, and with the latest electronics, It is bigger than the T-90 by 4 in. It will put that kid with the small Bulldog tank in his place! LOL. There also less money by a few pounds than the T-90.

P.S. Buy directly from Andrews site, he is on e-bay but he always will be there for you anyway.