When Solomon was a baby and toddler, and probably until he was about 4 years old or so, he was deathly afraid of the windshield wipers. If it was raining while we were driving, and we turned the wipers on, he would cover his eyes, cry, and repeat "Solomon scared! Solomon scared!" while pointing at the windshield. Yeah, he's come a long way... :)
Stephen, on the other hand, absolutely loves playing with the wipers, turning them on, and squirting window cleaner at the windshield. I think he enjoys the feeling of power he must derive from orchestrating this marvelous chaos, all with the flip of a switch.