Who let the firebug in?…

NGL, these characters (well, minus the red one) genuinely look like they're part of an actual kids show. They remind me of this obscure Canadian show I used to watch called 'Wee 3': https://treehousetv.fandom.com/wiki/Wee_3

Is this it?

Yeah!

I can imagine Buggin' Around being similar to that show.

We’ve had similar shows in the U.S. over the years. “The Banana Splits” and “The New Zoo Revue” are similar.