Persuasive essays, such as the one you propose to write, are not only intended to be written to convince someone to do something, but also to convince the audience to change their point of view, or perspective, about something else. Do not forget that, in order to do this, you should also present
- the rationale behind your point
- supporting facts that strengthen your rationale
- transition words
- active verbs and conclusion
This being said, why not consider asking your parents NOT to do something, and then use reasons behind it as your supporting facts. For example, you could ask your parents not to text and drive, to quit smoking, or to open up a college fund account for yourself.
The reason behind these ideas is that, when you merely ask for something, the reasons for having that item may or may not be relevant. However, when you ask someone to change an aspect of their behavior, or of their lifestyle, you can use medical, logical, or even social-concerning issues as your supporting facts and rationale.
At all times, do not forget to state in active words what you wish to accomplish with your words, and include, prior to your conclusion, solutions or ways as to how your goal could be reached.