I witnessed a couple of kids with a parent ride Buzz Lightyear's Laser Blast last month when I visited. Obviously the parent was in the middle and didn't have a laser leaving the kids had a laser each so I know that that happens on that ride as for the others I'm not certain. I've only gone as an adult with my boyfriend so obviously can't relate.
Ratatouille has three seats together, so that's definitely suitable for you. Other rides will have a carriage made up of two rows, so the kids could always ride together and you sit behind them.
Also there's so much more to Disneyland Paris than just the rides, you've got characters, parades, shows, dining, shopping.