Duplicate Gift - WWYD?

[Leiiki]

So, a close relative visited us recently and I told this person how excited DD was about a specific gift we were getting her. I showed this person the gift and DD talked about it several times.

Fast forward to this week, I get a package from said relative containing...the exact same item

This is not like a ball or doll where she might use more than one. It's a super-specific item you wouldn't need two of, let alone two exactly the same color, size, etc. It's also big enough that I don't want a spare kicking around our house. I would have to pay return shipping if I tried to return it.

What would you do?