Stu is throwing a surprise birthday party for Didi, but he forgets the cake. So it's off to "Bob's Fully Automated Bakery" with the Rugrats to get her one. But when Tommy's frog gets loose in the machinery and Baby Dil goes in to get it, Tommy's brother may end up as more than just icing on the cake. - Description from Klasky Csupo
When the babies arrive at the bakery, Dil becomes lost as a result of Tommy's frog hopping on the conveyor belt where Dil is enjoying the bakery's mobile.
Tommy catches the frog as a birthday present for Didi. It matches her glasses.
Strangely, Angelica is not seen at Didi's birthday party, but her parents are.