When Seattle resident Jack Macdonald died at 98, he left behind a staggering $188M fortune. He gave it all to the Seattle Children’s Research Institute, the University of Washington School of Law and the Salvation Army. Macdonald was known for cutting coupons and wearing sweaters with holes in them, but he amassed his wealth by investing in the stock market for more than 60 years. The donation headed for Seattle Children’s Research Institute is the largest gift to pediatric research given in the United States—ever.