The Popsicle was invented by an 11-year-old who kept it secret for 18 years. The inventor was Frank Epperson who, in 1905, left a mixture of powdered soda and water out on the porch, which contained a stir stick.
That night, temperatures in San Francisco reached a record low. When he woke the next morning, he discovered that it had frozen to the stir stick, creating a fruit flavored ice treat that he humbly named the epsicle. Eighteen years later he patented it and called it the Popsicle.