As a relatively new redfoot owner, I'd suggest moving with a little caution on them...they are incredibly wonderful pets, but they are also a little tough for new people to care for--while they eat just about anything, there is a fairly regular diet they need to have (and it has to be varied enough to meet their nutritional needs, so a lot of greens, fruits, weeds and floewrs, as well as the occasional bit of protein). The biggest challenge we faced as first time tort owners was the incredible amount of conflicting and/or confusing information out there--it may be a little much for a kid to handle! Also keep in mind that torts can be sick but not "look" sick, and the vet bills do add up if you suddenly have to deal with a long-term respiratory infection (very typical of pet store torts)...diseases are often long-term because torts take a long time to heal...
Redfoots also need a lot more space than your average aquarium will provide. We have ours in a converted kiddie pool with a large humid hide, several heat-resistant plants, ceramic heat emitters and a UV light source. It took awhile to build, but he's much happier there than he was in his glass tank (which we had to cover with paper so he didn't hurt himself trying to push through the walls).
I don't mean to discourage you, but our redfoot really required a lot more than we'd anticipated, despite trying to do our homework ahead of time. We love him dearly and are committed to providing him with a quality life for the next few decades, but that does mean adjusting our lifestyles a little (e.g., finding someone to take care of him whenever we are away, etc). I'm not sure how russians compare. I'd definitely recommend a couple of redfoot and tortoise books, which I can link to if you like...
Meg