how can we keep them cool while playing games?. I mean, keeping the laptop from burning your leg off and bursting into flames.
You could get one of those laptop fans you put under it. I have one and it works wonders at keeping my laptop cooler. Unfortunately there’s not much you can do. I’d suggest not gaming on your lap though. Gaming is intensive and will cause a lot of heat. And with laptops, the heat dissipates out of the bottom. I think a laptop fan/cooler would be the wise option.
Do not spend many hours all at once playing games on your Laptop. If you feel like it’s starting to heat up then take a break and do something else. Like @Andrew1337 mentioned you could get a laptop fan to help as well. Laptops are like our bodies, they need time to rest and recover.