Curious Sunny Bunnies are riding on their bicycles in the park. They discover a huge box containing a helicopter building kit. Not wanting to waste a second reading through boring instructions, the friends are trying to build a helicopter. But their awkward construction collapses straight away. The small engineers, however, are able to find a brilliant technical solution after all!

Sunny Bunnies appear in the circus arena again and they want to be entertained! But some kind of unknown magic force prevents the Bunnies from playing and they decide to catch and expose the invisible little rascal.