Spongebob Squarepants Costume Baby Tee Play it naïve and goofy at your next costume party with this funny SpongeBob SquarePants baby tee! Available in junior sizes, the Spongebob Squarepants Costume Baby Tee is a yellow, fitted female shirt with a soft feel and a trim fit. It features the goofy smile, wide eyes, red tie and brown trousers of your favorite underwater fry cook!.