The series features three magical hippo/pig/tapir-like hybrid creatures called the "Fimbles", who are portrayed by "skin" actors in complex, fluffy animatronic suits and all look quite similar apart from their colour and size.

It may be a natural phenomenon—a patch of sunlight for example, an everyday object, e.g. a tambourine, or something which would be totally inexplicable in the real world, such as a puddle of blue "galoo".

The snouted and concentrically-ringed appearance of the Fimbles was based on the eponymous antagonists of Lucy Anna and the Finders, written and illustrated by Sarah Hayes.

- It's A Party toured theatres across the United Kingdom from April–November 2006 and was devised by the playwright and author David Wood CBE.

The show focused on the characters planning a party, with CBeebies presenter Sarah-Jane Honeywell as the special guest, being the first human to visit Fimble Valley.

In the Republic of Ireland, Fimbles was broadcast on Network 2 (later changed to RTÉ2 in 2004) as part of a lineup of programmes for younger children called The Den and started airing on 20 January 2003.

Fimbles (핌블핌블) has been extremely popular in South Korea, where KBS 2TV broadcast the programme under a partnership with the BBC from 23 June 2003 to 29 October 2004.

In Spain Fimbles was broadcast on La 2 from March 2004 until Late 2000s during Los Lunnis,[8] Starting from 2005, it was also shown on Playhouse Disney.

As of 1 June 2007 Fimbles (粉宝乐园) is being broadcast in China on Shanghai Media Group's children's network HAHA TV.

Since June 2008, the show has also been broadcast by Tata Sky DTH in India under a partnership with the BBC on the country's variant of the CBeebies channel.