One Word at a Time

I found this website called oneword.com and decided to use it for daily writing exercises.  I seriously need to write EVERYDAY.  Today's word:
Coaster
The tiny tickle at the bottom gave me the first thrill of my childhood. Oh, roller coaster dreams ruled my nights and in summer days they enticed me, sirens of rails and wood. Coasters were beings with mystical presence, and they formed vistas in my mind; each slope a promise.