Participants are divided into teams.

Each team has to build a raft with which they have to complete a race on the sea or lake.

At the start all the teams will line-up on the beach or on the water.

Teams will be evaluated on commitment and collaboration as well as creativity. Points may also be awarded based on the number of people in each craft.

All the basic materials will be provided for each team. By solving some brainteasers teams can win extra material for their crafts. But they must also watch for thieves. The stealing of equipment or materials is permissible as long as the thief is not caught! Teams may also exchange information, equipment or materials if desired.

TTR will provide lifejackets, lifeboat, ambulance and all permits required.