It's Bruce's birthday and Platypus decides to make it a day to remember by throwing a party for him. His friend Echidna comes to help and together they make a special birthday cake (which Echidna turns into an echidna shape with bananas for spines). They put up paper chains and balloons - which Echidna promptly bursts - and set the table for a feast. All is set for a wonderful party except for one vital ingredient. The birthday boy is missing! Platypus hurries to bring him to the party and a wonderful time is had by all.