Self Portrait

First day of school activity.  This is a great place to start.  You can give each child a plate and have them do a self portrait.  You can give them any medium of art that you want.  You can use paper or just crayons, or yarn or paint or whatever you choose.
I would keep this all year and have them do another at the end of the year so that they can compare how much they have changed with details and art.
They will love this and you can bring in the student that is reluctant to participate because there is no restrictions on what they can do.