How can I still use my iPod touch 3rd/4th gen

You can use it for some things, like using it as an MP3/Movie player, using it as a digital photo frame, or use it as like a time capsule-style device to preserve the older era of iOS, but to put it simply, there isn't much you can use it for, due to the fact that the iPod touch 3rd Generation cannot go past iOS 5 and the 4th Generation cannot go past iOS 6

Hello BigBossDan23,

It looks like you joined the Apple Support Communities from an excellent starting point; Help your child set up an iPhone, iPad, or iPod touch - Apple Support. However, your question is not entirely clear.

If you are looking for support with setting up your iPod, the information on this page will help you out: Turn on and set up iPod touch - Apple Support. This page offers guidance for how to turn on and set up your new iPod touch.

If you need overall support with using the iPod, you can look over the iPod touch User Guide - Apple Support, and see where the support offered there can help with the answers you're looking for.

If you need different support, you may want to reply to this thread and include more specifics about the behavior you're experiencing and the help you're trying to get.

Best wishes!