Hi Kent. Thank you for your feedback. We do not allow ‘blocking’ of the water slides as this can cause a dangerous situation for all users of the slides when water is restricted and/or running to fast down the slides. These rules are clearly stated at the entrance to the slides and are there to ensure all users have a safe and enjoyable experience. We allow all inflatable soft beach ball style balls in the pools, we do not allow rugby balls to be thrown around in the pool for obvious safety reasons. I am afraid we have had too many children injured or concussed from being hit in the head by a rugby or soccer ball. Use of these balls is fine on the grassed areas. Regards.