There are a lot of props on
this site , including juggling balls, clubs, and rings. Also, devil sticks, diabolos, cigar boxes, and a ton of other clown related props.
I've not used them all, and likely never will (multi level rola bola for example), so I can't give testimony to the function of them. But for learning or getting a taste of a new item to see if it's for you (or taching a workshop for kids) they can't be beat.
The site needs translated, unless you are fluent in spanish, but there are a lot of photos in the tutorials to help you along.
This translator does a decent job translating the website. Let me know if you have a better one.