The Jellabies are six, happy, bouncy, colourful characters who all live in the Jolly Jelly World - that's the magical land at the end of the rainbow. The Jellabies main job is to make rainbows, for which they have an amazingly clever machine called the Jellyscope, a computer / teleporter / rainbow generator which is constantly monitoring weather conditions around the world. During their spare time, the Jellabies go on journeys, make discoveries and solve problems together, having lots of fun along the way.
There are six Jellabies. Strum, the musical Jellaby; Bouncey, who lives in his bumper car; Denny, who lives in a boat on the jelly-lake; Pepper, who lives in a tree house; the twins Amber and Coral who live in an air balloon and finally Duffy the green Dragon.