Bought an iPod off eBay with a bad battery, how can I make this a fun tech project?

So I'm broke and I buy the cheapest stuff. I bought an iPod Touch 6th Gen off eBay with a cracked screen and a bad battery for about $15. However, what I didn't know was that apparently the battery was soldered to the Logic Board, which I should've looked up I guess... what can I do to tinker a bit with this device, make it a fun tech project, and still make it usable? It says working condition other than the bad battery...