Awesome! It depends on what you're into. Wandering around is always a good idea (especially the canal rings). The museums are great. I'm told Micropia, the world's only zoo for microbes, is also awesome (if you're not a germaphobe). If it's a nice autumn day, the Vondelpark is a lovely place to go. There's a new lookout that opened, and it has a freakin' swing on top of the building. There are lots of cool places. Utrecht is also a short train ride away. But DUDE if you wanna grab lunch or coffee or want me to teach you the Way of the Bike or help you with train tickets just let me know. I am in Rotterdam on workdays, which is just a 50 minute train ride away.
Duuude! That swing looks crazy! I mentioned it to my friend and she said no way - she can sit and watch! The microbe museum is such an interesting idea too. Coffee or lunch sounds like a fantastic idea! Just to give you an idea of timescales, we'll be heading over on Thurs 12th and leaving on Tuesday 17th. So we have five days over there which seems like lots of time.