re: Flooring for bonus room/ kids' rec room. LVT vs eng wood or bamboo?

LVT is a great product and probably your best bet for a room like that. One thing to watch for in a bonus room is to make sure they level out the floor/subsurface. The LVT will show the waves/humps/dips more than the wood (but both will show).

I put down engineered wood throughout my house, including the bonus room. My buddy put down LVT. The LVT looks nice and is an upgrade from a laminate wood or other type flooring. His seems fairly scratch resistant too. We had a couple samples when we were picking out floors, and were able to scratch them easier than I expected. Between that and the appearance, we selected the wood.