Mason jar speakers

Working in construction and having an elementary age child I'm often given customers unwanted items for my son most of the time I end up having to pass them on due to lack of space or the fact he has actually grown out of it. 

After finding a pin on pintrist the other week for mason jar speaker was grateful I had decided to keep this make yourself cardboard mp3 speaker box

Luckly the speakers fitted into the lid of the mason jars. Just need to find a way to hold the circite board, battery and switch.