One of my classmate's kids gave me a gift and I don't want to accept it.
Why? Do you feel there's some problem with getting a gift from that kid?
Yes, I don't like taking free gifts for it makes me feel like a whore.
Declining a gift from a kid could be seen as rude, and your classmate will be offended. You should consider taking the gift and thanking the kid. They're just trying to be nice.
I don't want them to think I was a whore, no class.
You don't have to be a whore to accept a simple gift, you should just take it. No one would think any less of you if you are given something nice by a friendly person.