Betty is relaxing on the floor putting a "Wonderland Jig-Saw Puzzle" together. After she gets one of the final pieces in, a rabbit, the grandfather clock reminds her it is time for bed. The rabbit gets up out of the puzzle and walks through a mirror. Betty follows it and winds up in "Blunderland," on this takeoff of the famous Lewis Carroll story.
Betty makes the famous trip that Alice did, with variations of course. There are some cute and funny sight gags in here, as she gulps down a "Shrink Ola" soda and enters the tiny world of wild sights and sounds.
This is very entertaining as Betty meets the Mad Hatter, Humpty Dumpty (huh?) and all kinds of characters. Of course, she entertains them all with song and dance and we get the usual chase scene at the end with a big bad creature hauling off with Betty.
That last part was weak, which was a shame because the first half of this made this look like it was going to be a spectacular cartoon. It was still good, but not as good as it appeared it was going to be.