N.B.
Imaginarium has a lot to choose from that are wood or plastic. BRIO is also very good too. I think they're all pretty much the same although I avoided the Thomas the Train brand because of all the lead paint issues they had at the time. You might want to try a plastic one though if your son is rough. We got our 3 year old son a wooden one last Christmas and he managed to break a number of the people and a few of the tracks. He plays with them as he should but I think when he tries to rearrange the tracks they would splinter somewhat if he didn't get them just right and he would force them. I'm glad we didn't get a table as I fear what might have happened to that. I ended up just going to Home Depot and getting a $5 piece of wood (and sanding down the edges so it's not so sharp) and gluing it down. This works out well as I can slide it right under his bed when he's not playing with it and it's a lot easier to move around. It has worked very well as it keeps his attention quite well and even my 1yr old daughter enjoys playing with it.