The Wiggles are the Beatles of children!!
For someone who hadn't heard of them till a few months ago, I'm hooked too. Along with my daughter. We both sing along. As best we can. Laugh out loud at their antics. Shake a leg a bit too! That, for me, a two-left-feet guy, is saying a lot.
I'm certain I'm not the only middle-aged fan they've got. The oldest lady (at least 75, I'm sure!) at a recent Toastmasters' meeting regretted she couldn't attend the next meeting, since the Wiggles were performing a concert & she'd booked several months in advance!
If you've not heard them yet, go on, get yourself a copy of their video! For the child in you! You won't regret it!