Recommendation for a Manhattan or Hermosa Beach Park for Bday Party

the drawback with completely enclosed parks is that they often do not have restrooms. - there is a small park on the corner of Prospect and 21st in Hermosa Beach, it is completely enclosed, but has not restrooms. few blocks off to Redondo Beach there is a bigger park on Pullman - also nicely enclosed, no restrooms. depending on the time of the year, i'd also look into Round Table Pizza in HB - they used to have nice BD packages and Adventureplex in MB - bit more $$$, but lots of fun.
Good Luck
V

Live Oak Park is a good one for that age group. If that's not available, you can get one of the gazebos at Pollywog park. There's a big playground, but not right next to the gazebos.

Good luck.

Fort Lots of Fun on Prospect and around 5th street in Hermosa is nice, closed in and play structure, nice ocean view - but also NO restrooms in the park and none really close by unless you walk down to PCH (2 blocks) to a restaurant.

Manhattan Beach has a toddler park at 1901 N Valley Dr at Live Oak Park. It is fenced in and great for little ones. I believe you have to make a reservation for a birthday party.