If you have previously recommended this thread, you should see a tick / check mark on the recommend button. Click the tick to undo the recommendation (the tick may appear to change to a cross as you do this.) If you added a comment with your recommendation, you will need to delete that from your facebook wall separately.
my kids went there during the summer hols. 7 yrs and 10 yrs. They enjoyed it but not for too long. The material is hard plastic so they found it quite hard on the knees. You would propbably be better off with one of the soft play centres - DJ Jungle or big space.