Great tips! Our highchair tray it has a lever underneath you pull forward to take the tray off. The Tray has come flying off a few times in the pass week, scaring me and ds. I always check I put it on properly so I couldn't work out why it was coming off til last night. Ds gets his legs up, puts his feet in the lever and pushes forward, so the tray flys off . I didn't know if all highchairs are the same, our is a childcare one. It might be something to look at if buying a highchair.