I want my share of a family present.
What do you mean by a share of a family present?
We got a horse as a family present, but I never get any time to ride it.
It's understandable that you would be upset if you never get to use something that was meant to be a gift for the whole family. It's important to let your family ride the horse, but there's nothing wrong with speaking up and letting them know you want your turn.
I'll try doing that, thanks.
You're welcome! I'm sure your family will understand how you feel and will give you a chance to ride the horse.