They should'nt do the project again, you said they wouldn't if they did not
behave...
At this time of year, a project I have been doing generally with success is
take the kids outside 2 or 3 sessions to draw something from the school,
then back to class where they paint it. I provide a photo of what they have
been drawing, when they are finished drawing it. It has worked because they
are happy to be outside in the sun... Here are 2 pics, as you can see...
outside peacefully and still in the process of painting... But I am lucky, I
have only 15 students per class.