If it is high-end, you can give him game peripherals such as mouse and keyboard, which is very helpful for dota masters to operate. The price ranges from more than 200 to nearly a thousand miles. If you only entertain occasionally, you can buy him clothes printed with dota heroes, but you'd better know in advance what heroes he likes and wear them if you like. It's quite meaningful. You can search tee7 and Yuetu. I know these two companies sell them.