Can I ask for my dad to return his birthday present that I gave him?
Won't he find that to be an odd request?
I borrowed it and found something of better value.
I don't know how your dad will feel about his gift being borrowed. He might be a bit put off because you want it back.
It's not like I'm the one that wants it back. He gave me stuff I don't want.
You gave it to him for his birthday, no? That means that he is free to do whatever he wants with it and you should let him go-- you would be very mad if someone made you give a present back that they bought for you.