In the late 1980’s an engineer named Scott Stillinger was trying to teach his kids how to catch a ball, when an idea swooshed through his physics-inclined brain. How about a ball made of soft rubbery strands that small hands could easily latch onto. A little porcupine-looking number, but with none of the porcupines prickliness? Stillinger tied the rubber bands together for his first creation, and came up with the name Koosh because that is the sound it made as it landed in his hand.
The next workshop you deliver, how can you make it more fun/colourful and simplify the content.