Here is a fun way to combine art with writing with social studies! I have included variations to be used at K-2. There are two pages with a prompt and one without.
Social studies/History: Read informational story books about MLK, and discuss who he was and what he did.
Reading: Write the poem (it's actually part of a song by Ben Harper) on a chart or the board and have them practice reading it.
Writing: Have students write what their hands can do to make the world a better place.
Art: Have students do multi-cultural hand prints on the page. (I always do the art last because it gives them incentive to write neatly and to complete their writing)