Hi Iris, I agree that this is a good sentence, and it doesn't need changing. However, I'd have written 'turn on the TV, as we do 'turn on' the machine, and that's sufficient to get your point across, or I'd have used 'let them watch cartoons', or 'sit them in front of the TV'. However, these are only suggestions, and I wouldn't have changed yours, if you hadn't asked :)