From the very beginning, the Stadthaus had been presenting KIBUM, the big book fair for young readers, which took place during the Advent season. More than 2000 books were available to explore by visitors of all ages, from picture books and non-fiction publications to novels for young adults. The presentation of new German publications for all topics and age groups was curated by the university and the municipal library Oldenburg.

It was accompanied by a diverse programme which included readings, storytelling, painting and crafting based on stories, riddles, a treasure hunt, papermaking and much more. All this and much more was the Stadthaus KIBUM.

The KIBUM was presented by the Stadthaus, the municipal library, the office for culture of the city of Ulm, the Stadtjugendring and the local book shops Aegis, Hugendubel, Jastram and Kerler.

As of 2023 the KIBUM will be redesigned and take place in the municipal library hereafter.