Was ist Was: Junior – Ritterburg Kartenspiel
The game has an educational aim: by reading (or getting read) the texts on the cards, the children ought to learn some details on daily life on a medieval castle. In order to complete certain tasks, like "There is a feast at the castle. Eat with the nobler knights and lead the ladies to dance", you need to collect specific sets of cards (in the case of a feast: juggler, vegetables and roast).
Basically, you draw cards until you can complete one of three outlying tasks, then take the task-card, adding the worth of tasks once the pile of cards has been emptied.