The Terrible Adventure (2020) on Netflix

Plot summary

An elementary teacher gives two affluent, spoiled siblings a summer project: take action. At the same time their father is facing bankruptcy and their parents are divorcing. The siblings decide to enter the most complicated contest ever devised, a puzzle designed to identify the world's greatest talent for a task force and a non-profit that would address climate change, pollution and world peace. The winner collects one million dollars. Following the clues carries the children around Florida, over land, water and air, and they have to slip out of their house to work on each one. Chilly and Ice Man, the Ice Cream Men, want the puzzle and the money too, and they are willing to do whatever it takes to get them.