Ryder Robinson Has a Blast at the Beach!

While mom Kate Hudson, 29, played volleyball with a girlfriend and her husband, 4 ½-year-old Ryder Russell Robinson zoomed around in the sand and jumped breaking waves with the couple's daughter in Manhattan Beach, Calif. on Wednesday.

Dad is Black Crowes rocker Chris Robinson.

Photos by Oliver/Flynet.

Click 'Continue Reading' for a photo of Kate wrapping Ryder in a towel.