I need really good famous poems?

Hi! I'm writing a poetry ysis for LAL and I need good famous poems. I'm in 7th grade and the poems can't be too serious. In fact, a poem about smiling or laughter would be great! I want the poets name along with the poet. Poets like E. E. mings, Emily inson, and Langston Hughes would be amazing! Also, poem must be atleast 20 lines. Thanks!