Here is three idiomatic phrases connected with bees.

1. Busy as a bee
2. The bee's knees
3. To have a bee in your bonnet

Hello, I’m a very interesting and intelligent man. And today these bees and I are getting together to teach you a thing or two about English idioms. I bet you’ve never been taught by a bee before!
Look at them all working away: busy, buzzy bees.

Busy, buzzy, buzzy, buzzy, buzzy ……buzz buzz.

In English, if someone is very busy or is moving around quickly doing lots of things we can say they’re busy as a bee.