My ds used to sit fine in his highchair to eat now he cries and constantly wriggles and triea to climb out of it. He can even get out of the harness! A baby strait jacket wouldn't keep this one in!
I've tried toys etc to hold his attention but they don't work. He is 8 amd 1/2 months, very inquisitive and always on the move. Maybe he has just found a new skill and it will wear off!
Any advice would be welcome.