Yes, there are fancy fans that you may get, which run on power supplied by your machine via USB plugs. But there's a cheaper option.
Simply by placing two equally sized objects under the back of your laptop.
This leaves space under your laptop, which provides better ventilation around your laptop, therefore allows your laptop's cooling system to work more efficiently.
For me personally, this has saved my laptop reaching uncomfortably hot temperatures for my hands. And also raises my keyboard, which makes my computing experience more comfortable.