I'm glad you got it running. I'm also super happy that you are starting your kids off right with REAL thinking person's game. I was about 12 when I first picked up RCT and loved every minute of it. There was no trainers (or at least I had no idea how to get them to work) when I was playing it. I had to learn the hard way. It's so much more satisfying knowing that you EARNED every section of that rollercoaster and have it triple your profits in half a game year.
Sadly there is no build mode in the game (this was a feature added in the sequel) and trainers won't work with this version. Loopy Landscapes/Added Attractions patched them out so unless somebody has made a trainer specifically for Loopy Landscapes, none of the currently available trainers will work.
Also, since Chris Sawyer wanted it to be a game rather than a design tool he didn't implement any money cheats or anything like that. So you have to actually use skill and strategies to be successful.
There are PLENTY of guides online that teach you the ins and outs of the game. So perhaps you could have fun learning the game and then pass the knowledge onto your boys?
Good Luck!
EDIT:
http://dl.fileplanet.com/dl/dl.asp?strategyplanet/rctuk/tid/rctsavegamemodifier313.zip That will allow you to edit your save files and give you anything you need. It will even allow you to unlock all research even stuff that isn't available on that particular scenario. Happy building!
BTW I've confirmed that this does indeed work on this particular version of the game. It's not an unlimited money cheat, but it's the best you can do without somebody developing a working trainer that pokes/peeks the memory on the fly. :)