Well, how long is a piece of string lol! It depends on how long it will take them to get the hang of it, how long you can keep their attention etc etc.
I would suspect that a day of juggling woul;d be enough.

Maybe one thing to THINK about is to do a talent show for the last 1/4 of an hour of the school day showing the other children what they learnt. This could be repeated for different classes, because you would be teaching them different things i.e. devil sticks and bounce juggling etc etc. However, I would assume that for the future because thaty would really start to get expensive. If you tought 1 school of 7 classes over 7 days ball skills, then you would be able to return teaching other forms of juggling.


Ali

P.S. Please take everything I have said with a large pinch of salt, I have no experience of teaching schools and am only 14. Cheers

I wouldn't have any juggling rings as general workshop equipment. I don't have any scarves, but they're cheap so they bulk out your workshop collection. Peacock feathers are great for a one-off workshop indoors (crap for outdoors but then so are scarves) try http://www.ostriches-online.com Diabolos are good, even for a general workshop you should have 10 sets (but work out how you are going to stop the strings from getting tangled). Devilsticks are good for teaching a group of people but poor for general workshops as people don't know what to do with them.
Pedal-gos are great, Fun-wheels not as great as they break more easily, rola-bola are cheap and simple to construct but beware the accident potential.

Before you run a workshop work out a risk assessment for each prop. Particularly consider pointy plastic sticks and eyes and falls from mobile props.

Nigel

Cascade88
Your analysis is all hypothetical. Listen to what Nigel suggests, and do a mini class for free somewhere. I think you will be able to seperate the good ideas from the unworkable ones rather quickly.
Al Angello

Yes I am going to do a free workshop at a school I used to attend hopefully.

Good, watch what works, what doesn't work, and buy more of the stuff that worked.
Al Angello