Ævintýri í Latabæ was a Icelandic children's musical stage play that would have been the third LazyTown play after Áfram Latibær! (1996) and Glanni Glæpur Í Latabæ (1999). It would have been got into production in 2014 but due to either licensing issues or poor reviews, the play was unfortunately cancelled. However, there are a few things related to the play, such as footage for a song called Dansa, áfram Dansa! (which roughly translates to Dance, Keep Dancing!), pictures, as well a trailer for the unreleased play.
https://www.youtube.com/watch?v=zYdn9BwTRmE (Dansa, áfram Dansa! Song)
https://www.youtube.com/watch?v=q_wukztvr8E (Ævintýri í Latabæ Trailer)
EDIT 2021/12/31: I have found out who was responsible for the design and construction of the set: http://www.verkstaedid.is/aeligvintyacuteri-iacute-latabaelig.html