Oh, and he was only sat in it (with the tray) for short times, so I could answer the door, Hoover the room, or go to the loo. So he wasn't sat in it for hours either.
He just can't stand being 'trapped' in anything - he climbs out of the highchair, the pram, he had to go into a bed at 16mo because he refused to sleep in a crib with sides, he hates being cooped up, and always has.
He is currently 18mo, and I can't even keep him in any of the three sets of reins I have tried for him. He doesn't like holding hands either. He will, just about, hold onto the side of the pram, or endure being scooped up by me when he strays too close to the road, but being restrained, in ANY form? Ha! I wish!
And it's not as if I'm being overly PFB either - he's my fourth, and I never had these problems with the other 3.
He sits on a proper chair for meals, he walks freely or holds the pram (non-negotiable when crossing roads), he sleeps in a proper bed, he climbs out of playpens, and hates lifts.
When you have seen an 10mo NON-WALKING baby climb out of his pram, then try to crawl off, it does make you boggle a bit!
He is a bit of a naughty toad 'free spirit', my DS3. I have had to put on certain non-negotiables to keep him corralled safe.