Wobbly Tooth Shark came about from the first Great & Grand Rumpus in 2018, it has undergone many iterations to become what it is in 2021!
Take a look through some of the documentation of Wobbly's journey from concept to fabrication.
Read through some the background of both the 2018 and 2021 iterations of the shark mouth,
https://wiki.slq.qld.gov.au/doku.php?id=engagement:the_great_and_grand_rumpus:shark