Just a heads up for people who might be looking for train tickets.
Blokker currently sells a train day ticket (including use of RET system in and around Rotterdam) for €14,50, not valid during peak hours.
Can be used from July 16 till September 23.
The ticket comes on a disposable chipcard, so no need of a printer or computer to use it.
Also saw discounted tickets to Duinrell at HEMA for about €15.