"My little guy is autistic and loves planes, trains and cars. He inherited his uncles battery duplo train set from 20 odd years ago and it's still going strong. Since then we've added the starter train set, the deluxe train set and 2x points and accessories pack and an extra bridge (via the spares shop). He takes over my living room and can build it himself. He's very heavy handed and chews alot but all the track, trains etc are all going strong regardless. i also love that because it hasn't changed, ever, you can very easily add to it with secondhand bits!!!
I highly recommend all the train sets, they may seem an expensive outlay but they will go on and on and seem to be indestructable (trust me we've tried!!)"