I’ve been running unicycle sessions at one of the local schools, for kids grades 3-6. Lots of fun so far!
The lack of suitable fixed railings at the school made the initial learning feel trickier than it already is. I got to work on a portable training frame — one that could comfortably fit 8 unicyclists, fit in the back of the van along with the unicycles and take a short amount of time to assemble/disassemble.
Nothing too crazy, but the kids agree that the training frame has been a big help
http://unplannedismounts.com/2009/05/27/unicycle-training-frame/