A lot of fun for the kids. An old industrial unit in the port area has been cleaned up and dozens of industrial strength trampolines have been installed. They whole area combined must be close to the size of a football field. There are different areas, each safely netted off from the others and most importantly the ground, so you can throw yourself into the fun fully without fear of flying off. Perfect for rainy day and kids' parties you buy tickets for periods of an hour with the first hour starting at 12:00 (last at 21:00). Also find them in Gdansk at ul. Grunwaldzka 355.