I know this may seem expensive, but it is the BEST Onomatopoeia lesson! You will not regret buying it. I taught this concept attainment lesson for an observation for professors of the University of Pittsburgh. I ended up winning a 10,000 award for it. It's an awesome lesson and the students are very engaged!!! It's an inquiry lesson where the students study examples and non-examples to determine the true meaning of what onomatopoeia is. I taught it in 4th and 6th grade, and it challenges both grade levels. This attachment includes 3 handouts that go with the lesson, the actual lesson plan, and post observation questions. I have the PowerPoint uploaded on this website too. I'll send it to you free of charge if you can't find it. My email address is email@example.com or firstname.lastname@example.org if you'd like to contact me. Enjoy!!