FIRST has many scholarship for high school seniors who are in one of their programs. For more information you can go http://www.usfirst.org/scholarshipsearch.aspx
to look through them and search.
In my experience when I graduated 3 years ago and currently when I try to apply for scholarships, they all require a "essay" of some sort. Some are simple like "How have you benefited the community?" to "How do you plan to make a difference in the world?"
If you are looking for more of a drawing(where they just pick a random person) you can always search google for scholarship websites. There are many out there and some do have that.
Good luck and I hope you succeed in college.