Another book in the series that starts with Tant Grön, Tant Brun och Tant Gredelin
. Tant Brun, the brown-clad maiden aunt, is going to have a birthday. The other aunts decide they'll make some clever improvements to her clothes, while Farbror Blå composes a little playlet in her honour and drills the two children until they get their lines right. I get the impression that he's got some kind of crush on her, but, although his verses are a trifle suggestive, he does manage to stay the right side of decent. As if you were in any doubt about that.
Several comic misunderstandings occur when the dress is kidnapped and taken off to be improved, but it all ends happily. It's definitely one of the wittiest episodes, and amusing for adults as well as children.