you can do decopage and coat in varnish or varythane (sp?). The real thick stuff they use I think is epoxy. But, google and see for sure, I'm guessing!

It's not the *desk* that needs to be interactive and fun; try ditching the chairs and getting stability/yoga balls :) http://www.philly.com/philly/health/kidshealth/Teachers_ditch_student_desk_chairs_for_yoga_balls_.html http://www.huffingtonpost.com/2012/11/28/exercise-ball-classroom-desk-chair_n_2206743.html http://www.kshb.com/dpp/news/education/kindergarten-classroom-has-no-chairs http://newadventuresinfirstgrade.blogspot.ch/2011/09/where-it-happens-wednesday.html

Perhaps a large round table might mean a rug is not at all necessary. It could be a metal tray table, or carved wood like Rebecca Mitchell Interiors illustrates. Ideas also to consider, using multiple tables can be found at http://www.houzz.com/multiple-coffee-tables. I also agree with comments above that some color is needed on the walls. You could then hang round mirrors, or an unusual curved shape like RMI shows above.

There are lots of nice cordless lamps. What if you take the picture to a store that just sells lighting, and see if they have something similar in their catalogs? It would be expensive but maybe worth it if you love having them be the first thing you see when you come in the door.