I was there with my three years old son on the 2nd of January. The place is located under Sony center. The ticket is much cheaper to by online 13,70 Euro instead of 19,50 Euro at the gate. I think that the place is just too small to accommodate many visitors and it is charging so much money for not much attraction. There were almost no place for parents to take a rest while their children were playing. In addition, children cannot enjoy playing because there are too many people in such a small place. If one want to buy Lego, it is better to visit Lego store in Berlin, which has much more selections.

We took our two kids (6 and 4) to Lego discovery, both are big fans of Lego, and having seen the queue, we paid the extra for the fast entry, which still left us queueing for at least 20 minutes, but compared to the main queue, which we estimate would have taken well over an hour, it was worth paying the extra for.
We all loved the mini world at the beginning and the seated ride was fun for the kids. In the main area, the kids loved the Ninjago soft play, and the Lego building table. We also went to the cinema, although the screening timings were poorly advertised and it was, understandably, in German, so the kids found this a little boring, not understanding any German. We skipped the DUPLO area, and neither of our children were interested in building and racing their own Lego cars, although this looked fun for older children. Just over an hour into our visit and we had done everything of interest. We therefore exited into the shop with the promise of a small Lego set for each child.

We left empty handed as the prices for the Lego sets were astronomical. They were at least twice, if not three times more expensive than you would find in a high street shop, or online, which we felt was hugely inappropriate.

It was a good lesson in value for money for our kids, but I am still reeling from the inflation that Lego feel they are entitled to add on to their products here. Very disappointing.