I hadn't realised it until a few uke players wandered into my folkie life in recent years. Cameron Murray, the son of one of my friends is the only Australian member of the Hawaiian Ukulele Guild & the first time I saw him & uke in action his hand moved across the strings in a blur.
Mick Conway of the legendary National Junk Band is another legendary player, multi-instrumentalist & magician (sword swallowing & card trick & stuff, not a typo for bloke who makes music!)
Singer, multi-instrumentalist & children's entertainer Mike Jackson includes a tutorial for children on his site.