The bumbo tray is a useful add on to the bumbo seat as then it can act like a mini high chair. Or you can stick babies toys on the tray to help keep their interest. It is easy to clean which is great. But it can stick getting it on and off and we found the baby needed to be in the seated in the seat to put it on 1st so it made this action a bit jerky.
I am glad we got the tray, I just wish it was easy to get on and off.