Spoordeelwinkel is a great place to get ideas for trips around the Netherlands. The items offered on the site are a varied, from day trips to museum, zoos or theme parks, to a meal at a restaurant, or even an overnight stay at a hotel. These offers always come with a train ticket (greatly reduced in price) to the destination.
Take a look around the site. You’ll be sure to find something that peaks your interest.
Note: The only way to pay for tickets on this site is through iDEAL, which is connected to Dutch online banking systems. You will need a Dutch bank account to use this service.