Interested in this too. My 6 year old has a love of trains (steam mainly), but I don't think there's anything online. He gets a lot of enjoyment from talking to other spotters at the stations when the 'specials' come through.
You might be on to something here RnB! My son would love this but Hornby is too grown up. If you're putting something together, could it also have a dinosaur section? (split very accurately into time periods please, otherwise he wouldn't give it the time of day!) .
Sorry that's not very helpful, but I too will be keeping an eye on this one...
I'm looking for a forum for my 10 yr old son (who has autism) to be able to chat to other enthusiasts on. He is starting to understand that not everyone is interested in trains and he would love to talk to like-minded children his age. All the forums I've found are geared towards adults. Any ideas?