I saw one of their very first shows...
I think I must've been three years old or thereabouts... they were doing several shows at different locations around where I lived and my parents took me to see them all, as did my friends' parents, despite the fact they were the same each time. We positively loved them.
Back then, they obviously weren't as famous or as wealthy as they are now, so it was simply four guys up on a stage in a youth hall, wearing black slacks, colored t-shirts and white sneakers. Anthony used to be the Green Wiggle!
When they did Dorothy the Dinosaur, Henry the Octopus or Captain Feathersword (I can't remember if they had Wags the Dog back then) one of them would go offstage and get changed into the costume, which consisted of a hat and a tail that you tie around your waist or something. For example, Anthony used to be Captain Feathersword, and I'm pretty sure his brother does it now, or at least used to.
It was awesome, and I'm so proud of them for being such a sucess overseas. I was stoked when I met them once and they all autographed my ticket (even Dorothy!! :P).
My favourite Wiggle has to be Anthony. I'm 15 now, and although I don't listen to them on a regular basis, when I see my littlest cousins and they're watching the Wiggles, I love to sit down with them and have a sing. The Wiggles rock!!
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"Elves are cool, man." - Orlando Bloom