If they are toys you like, then I would keep tham to give to another child. Or you could take them to a resale shop for cash or in store credit. We have done that when people have given us clothes our dd had already outgrown, so we could get things for her to wear that would fit. Or you could give them to a Goodwill or something like that. Hope that helps.
I would take em back if I had receipts. Or save and regift them- I'm sure you have a birthday in the next few months.
Of course being a mod here you know about the TP and of course the old standby- ebay.
"The true joy of life is the trip. The station is only a dream. It constantly out distances us."
I would probably either keep then for regifting or offer it out to someone in my mom's group. I might even freecycle them if they are just taking up too much space. I have gotten a few really great things on freecycle, so I don't mind giving away nice things.