Amsterdam: Traveling from Amsterdam - Zolder - Paris is train transportation available
It's real easy actually. You can go by local train from Amsterdam to Brussels and it'll take you three hours, or go on the thalys and get there a lot quicker. www.hispeed.com can help you get a ticket from Amsterdam to Brussels...
Amsterdam: What are the best free things to do in Amsterdam?
Museums are pretty expensive over here. But there are a lot of galleries around Nieuwe Spiegelstraat you can walk into whenever you want to.