Answer:
"Mom, Dad, I was really looking forward to this toy and I wanted to ask if I could please have it? I was going to take the doll with me while I did my chores and schoolwork. When I first saw it, I was so excited! I think it could be a good motivation for me. May I get the toy, please?"
Explanation:
convince them by relating things they want to things you want. make them believe what you want will get them what they want.
