I’ve always enjoyed my trips to the Euromast Uggboy and regularly took my kids there when I lived in Rotterdam. My eldest son recently abseiled down from the top and I’m only to glad I found out after what he had done!
There used to be a very good restaurant in the park, Chalet Suisse, but I’m not sure if it still exists?
Another great restaurant is Parkheuval, which had 3 stars but now 2 I think? The food and atmosphere is great and Erik van Loo is a great chef. If you’re still in Rotterdam try it as you’ll like it very much.