Hooray! I am so jealous
If you set up a shave horse and let the little ones try a spokeshave they will be thrilled!
A spokeshave is the first tool I hand any newbie in my shop.
A honkin big coopers shave will be just that much more impressive.
My grand daughter used to squeal out loud when the shavings came pouring out. The trick is to lean in behind them and place your hands very gently on top of theirs. Just enough to guide them. The smart ones will get it right away and the dumb ones never will anyhow.
My favorite is kind of a mini-cooper shave. Only a 5" blade :)


I guess keep the axes and adze high on a rack at all times. Maybe make a snap cover for over the jointer too. There will be a strong temptation for little ones to want to run a finger down the blade. In fact you better set up a rope in front of the edge tools rack altogether. Nothing more dangerous to a newbie, than a good drawknife.
Shavings and pegs and plug buttons strewn around for the little ones to touch will get their attention, even if not specifically cooper related. You will lose a lot of them, but then bags of 100 are not expensive.
I would take some firewood and split it into kindling as well. Coopers didn't work in the cold --all-- the time, and had to start a fire like anyone else. Oh yeah, they had to char barrels too, so there is another excuse to have a pile of kindling handy.
Give a kid a stick and.......................
yours Scott