You should definitely make a post about your cousin’s situation and ask people to upvote and donate! I hope that the surgery goes well and I wish your little cousin a speedy recovery and a long healthy life ahead!

However, this contest is only for registered charities (as in, organisations and campaigns), not for personal or family-related fundraising purposes. Having said this, I’m still going to support and upvote your post, even though it cannot participate in this contest. Good luck!