How to occupy 5 month old!?

Hi! So my husband and I are starting a farm and we have a 4.5 month old son Leo. Leo likes to be worn and bounced on the exercise ball and will sometimes tolerate sitting in his vibrating chair. He will play on his play mat and do tummy time but gets fussy quickly.

There are times where I just really need to get stuff done on the farm without wearing him, what product would work best to occupy him? Is a swing just for newborns? Some toy that would occupy him? Thanks!