Just like they write on their brochure: a kids' paradise. It is very cheap: EUR 3.5 per 2 hours. This includes a child and one parent. Extra EUR 2 for a second parent. A huge indoor activity play area for kids of a wide variery of ages (1-12Y old roughly). Includes: trampolines, inflatable structures, climbing, shooting balls, ball pits, building towers, video games, drawing and more and more. So much fun for such a cheap price. It's on the second floor. Right above the Tesco supermarket.
We were there with a 2Y old toddler and he was amazed.