You can buy all sorts of cool gadgets online. In fact, almost any gadget that you can find in a store, you can also find online. Some of the coolest gadgets right now are gadgets that are smart, or use bluetooth. One of my personal favorites is a wireless bluetooth speaker that will connect to any device that is bluetooth enabled.
So most people can play music on a speaker using their phone. You can also find home assistants like Amazon Echo or Google Home.