Pip and Posy are having a lovely day at the beach, collecting shells and digging in the sand. But when Posy takes a nap, Pip makes a new friend named Zac. Zac is very cool: he has lots of fun toys and he’s really good at handstands.
 
When Posy wakes up, she finds that Pip is more interested in playing with Zac than with her. A funny and dramatic story about discovering that two’s company and three’s a . . . PARTY!