Actively involved  audience  in the message is the best way to start-

GIVE THE GAME OR EXCERCISE  -   Pick somthing relevant . Having fun helps people to understand.

REPEAT WORD OR PHRASE-  Every time you say certain word or phrase,have  your audience do somthing in response.

HAVE THEM TALK BACK TO YOU - If your key pionts are short ask your audience to repeat those keypoints. Activate their minds by getting them to think of time , event , try to make message tangible .