So, the first thing you need for a beach party is a beach, in this case created by a number of loads of sand dumped in a parking lot.
From there on, it's whatever you can find. In this day and age, huge inflatable toys seem to be a favorite of the youngsters.
One thing we do have plenty of for a beach party - heat. More imagination and some water features help cool the mind, at least. This is a miniature golf course.
And there is a radio-controlled boat in a small pool of water.