Abenteuer auf dem Zahlen-Fluss is a game for children to learn easy calculations with numbers from 0 up to 100. There are two different games included in the package, one is called "Flußurlaub", the other "Besuch von Neptun". The first game is an area-control game where players win an area by placing 2 tokens of their color in the area. The areas contain numbers that represent results of calculations that a player has to do correctly. The next game is a racing game where a die decides the place where the Neptune-figure has to be moved to. Players try to reach Neptune first by putting tokens on an area with numbers. The numbers are again results of calculations that a player has to do correctly.