Create a word as quickly as possible.

There are at least 2 teams. Each team is given a word, e.g. holiday. Upon a given signal, the teams jump into the water and dive to the bottom to collect the letters needed to form their word. The fastest team is the winner.

Instead of being given a word in advance, each team member collects one letter and then the team has to make a word. The winner is the team which makes the word using the most letters.