First, he decided he wanted to do some painting. Of course I was so excited about this, because like I said it's not always his first choice of activity. So I prepped a piece of paper and gave him some oil pastels and stickers while I got the paint ready.
Here's one of the masterpieces, which I think I want to have framed.
Because of it I got a book from the library called First Art for Toddlers and Two: Open Ended Art Experiences. It's hard for me to make it truly open ended. For instance, with the collage I felt like it needed more, but he had lost interest. For a few days I kept asking him to glue more things on or at least draw on it with some oil pastels. He eventually did, but I probably should have just let it be.