App Sharing

My stepson has an iPod Touch. We also have an iPad and iPhone and download games quite often, which sync up wonderfully. On my son's iPod, he has his own account since he totes it around to his mom's, school, etc. Is there a way to easily share the games I download to his iPod? Do I have to login to my apple id on his iPod, or can I sync certain things via iCloud? Thanks so much!

You'll have to sign into your account on his device to download apps purchased on your account.

Just sign in with your account on his ipod touch/ipad.