love the mobility of the concept. I still want to hack a school bus to create mobile PD opportunities for teachers.
for playbod, there could be different applications of this idea -- could you use cargo containers to create prototypes? what if you used multiple cargo containers to create a playpod "village" or area? there could be a pod for a tutoring center for older children along with what you're proposing for younger children. you could paint the cargo containers like building blocks that kids play with.