With the Rotterdampas you can do a lot of fun things in Rotterdam for free or with a discount. Join a tour on the Spido, visit the Euromast and all of the musea for free.
But you can also visit Blijdorp with a discount, go to the film or to Duinrell for free (1x).
The card comes with a booklet with coupons you can use and the Rotterdampas Magazine where you can find all information about the card.
Check out the Rotterdampas-website (only in Dutch). More information at the Central Library (Hoogstraat 110).
On the website of the Erasmus University is more information about discounts on culture in Rotterdam.