Happy Mother's Day! is a 1989 Sesame Street storybook featuring Grover and his mommy. Grover makes a card for his mommy at school, but he can't think of anything to give his mother as a present. On his way home, he asks his Sesame Street friends for advice. Oscar the Grouch suggests a bunch of stinkweed, Bert suggests a new mop, and Ernie thinks a Rubber Duckie would make a good present. Grover rejects Big Bird's suggestion of a birdseed cake, and tells Cookie Monster that his mommy already bakes the best cookies.