You might want to grow the channel up to 1000 subs before applying for the YouTube Partner Program, instead of relying on other paid-to-upload platforms.
Once approved, their videos would be eligible to display advertisments as long as they adhere to the advertiser guidelines.
Of course, I never intended for the kids to be involved in anything like that. I use Google and the internet as a "think tank" for myself, following the Yellow Brick Road from one minor thought of an idea to the next and that site was along the way because I remembered using it many years back. The only other types of programs that I might set up for them is Mixer and maybe another streaming site, when they are ready. Probably get a Facebook age and stuff like that for them and teach them how to post and answer comments and the like, letting them slowly handle their own things. I am sure they will make some mistakes and say the wrong thing to the wrong person or little stuff like that and lose a little ground, but I will make sure that they follow the protocols and rules of each program. I was really getting into setting up Mixer with them because they have a really nice system where buttons on your channel and live stream can directly interact with the game that is being played. For example, you can target the intent to a button on Mixer that sends the "summon zombie" command to Minecraft and it will cause that to happen in the game, or "give @a 1000 diamond_block", I think that's the syntax, and reward the player. So the audience is choosing the path the game takes if you program it out like that. Really great idea, but its a rough implement because Mixer just supplies their end, you have to have the command syntax for whatever game is being played, and on Xbox One they are pretty tight with info, but it'll get there.
