There's no mystery about it! One of the most fun and engaging ways for students to practice identifying parts of speech is by coloring a mystery picture!
Following a key, students match a word's part of speech with its representative color, then color squares to reveal a mystery picture. The parts of speech practiced in this picture are nouns, verbs, and pronouns. Besides printing for individual students, the coloring sheet can be projected on a whiteboard for whole group instruction/participation.