Last week my niece and nephew watched me working with Tilly using clicker training and they've been really excited by the idea. They've spent all week clicker training each other

So I'd like to try and channel some of this interest and let them have a go at clicker training Tilly, but I don't know if this is a good idea or not.
What would be a good thing to start with? Would it be a good idea to teach Tilly the trick first? It would be good if it was something really fun - I was wondering something like getting a ball or dumb bell when it's chucked (although obviously broken down into more steps - maybe I could get Tilly reliably touching a ball to start with, then the kids would work on the retrieve part).
Would this be fair to Tilly, both of us are real clicker training newbies, would the less than perfect timing of small children (5 and 8) completely wreck the work that I want to do with her.
Thoughts?
Olivia