A great way to entertain kids on a rainy day (although this is when it's busiest), this indoor playground occupies a former traffic underpass. Kids can clamber over soft play equipment, jump on trampolines, try to escape the 'black box' and play on a soccer pitch. There's a cafe serving kids favourites, such as poffertjes (small pancakes) and Nutella sandwiches.
Kids must be accompanied by an adult. The entrance is located opposite the Portuguese-Israelite Synagogue; look for the two green arches and stairs leading down. Adult entry price includes tea or coffee.