A great way to entertain kids on a rainy day (but this is when it's busiest), this ace indoor playground is located in 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 kiddie 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.