Based on characters from a series of greeting cards in the early 80's, the Shirt Tales acted as a lead-in to Smurfs when it debuted on NBC in 1982.
MzTavish uploaded the open, taken from Retrojunk.com.
The amazing thing was how the team managed to carry out their missions without Park Ranger Dinkle knowing about it. Even more amazing was that it didn't last as long as you'd think, just a couple of years before NBC pulled the plug. CBS would pick up the series as a mid-season replacement a few years later.