If your kids don’t need a laptop, I’d highly recommend just getting them a desktop pc with GTX 1060 or RX 5600 or better. You should be able to find these used at a fraction of the cost of gaming laptops with the same performance, plus they’ll be a LOT quieter.
Gaming performance requires cooling, which means ideally some big chunks of metal with a lot of air going through. Laptops should be light, thin and portable. These requirements don’t mix well.