You’ve probably seen these business card sized minicards at the AFRC. These cards contain information about many of the attractions in the local area. Most also provide discounts to the businesses advertized. Aside from the AFRC, I have also found these cards at the VVV in Maastricht, which has a ton.
If you’re just looking for new things to do, you can check out the minicards online. Just select the country and region you are interested in to get relevant cards. You can print these out, but the cards online usually don’t have the discount included on them.