You will go on a journey through the planets to collect valuable minerals and, in particular, precious stones. In order for your rocket to move freely from one planet to another, you need to solve a mathematical problem. Among the four addition examples presented, there is one that has a different result from the other three. Find it and click. Immediately you will have access to resources and will be able to continue your journey in the Planet explorer addition. Under pleasant musical accompaniment, explore the entire galaxy and collect colorful crystals.