I've taught this lesson many times in the past, and it is always a favorite with my students. I originally found this lesson on The Incredible Art Department. For wonderfully detailed instructions on this project, just click on the link above. 
These are very fun!
I've done this lesson many times in the past. I originally found this idea on Deep Space Sparkle. I love this lesson because it is very simple. Basically, I teach my students how to draw a cat or a dog. Then each child fills their dog or cat with patterns. Lastly, we cut them out and glue them to construction paper. 
These are very cute!
I've done this lesson several times in the past, but I love it every time. This is a very simple lesson that looks great.
I begin by having the students cut a vase out of paper. After this, we begin making the pedals. I have the students cut through four pieces of paper at once, in order to create four symmetrical petals. We then bent the petals and glued them to the paper. The petals should stick up off the page. Lastly, students used oil pastels to add stems and other details. 
These remind me of Spring.
This project was based after the artwork of Karla Gerard. Karla Gerard is a folk artist, who uses bright colors and patterns in her work. 
For this project, I had my students draw hills, houses, and trees with a black crayon. After this, students added patterns with oil pastels. Lastly, students used watercolors to paint their drawing. 
I think these are wonderfully colorful!
I have done this lesson several times, and I know it is a lesson that many art teachers have done. I am not sure where this lesson originated, but I have seen it posted on many sites. On the 100th day of school, I had my students draw themselves as 100 years old. We colored the face with crayon, and used watercolors for the background.
Every year I think these are hilarious!
I came across this really cute idea on the blog Just For Fun. The idea from this blog was to create a stamp from a potato, but because I didn't have enough potatoes for 24 preschoolers, I decided to make stamps from craft foam. Basically, I just made a stamp by cutting out a piece of craft foam and then gluing a clothes pin to the top for a handle. 
After stamping on the body and the wings, we glued a small white oval for the belly. We then used Q-tips to add the feet, beak, and snow to our paintings. While students were working on this, I went around and helped glue a googly eye to their project. 
These are just too CUTE!