We are a family of 4 (2 adults, 2 kids 10 and 13), staying 3 days in Amsterdam, based on Westerstraat in the Jordaan. We'll be doing lots of walking, but (especially because we are meeting up every day with folks staying near Leidsesplein) I can imagine us getting exhausted towards the end of the day. So, wondering, once you've got 3 adult / 1 child fares, will it be about the same price to just get a taxi? Let's assume 3 km distance. Also, are they easy to find or hail? I'm a little confused by all the chipkaart options, and how much a single trip costs if you get a refillable chipkaart. Thanks!