I greeted my two groups in the commons area and provided them with the instructions. The immediately began to plan, explore the materials, and test out ideas.
For two days the kids did not go to class (except for music at the end of the day). Instead they learned on the job. They learned about teamwork, planning, revision, and overcoming frustration in a fruitful way. They found that they were having fun AND learning.
See a successful run here!