In the piles of college mailings sent to my daughter was a brochure for the Rose Hulman summer program Operation Catapult. It was in the form of a fold-out cartoon of a Rube Goldberg machine so I handed it to her little brother who was into Rube Goldberg at the time. Daughter saw him studying it and was intrigued. She attended Operation Catapult and it was a highlight of her high school years. She subsequently applied to Rose Hulman and was accepted but went to another college. We would never have known about Rose Hulman or Operation Catapult without that onslaught of college mail.
(For his part, little brother went to Explosives Camp at Missouri S&T when it was his turn for an academic summer program.)