Special Last Day

We held a group discussion about what to do to make the last day of our Think Tank special. The kids want:

-Game play the entire time
-No evaluations of any form
-Game designers come play with them for 1 hour
-Possibly invite a friend
-Special "non-healthy" snacks (they are willing to bring their own) or pizza

I did not promise them anything, but said I would share their ideas with the people in charge and see what we could do. I personally don't think it is a good idea to allow them to bring a friend, mainly due to legal/permission slip issues. I think the other requests are reasonable. I asked if they would like their parents to come and the answer was a firm "No".