Infant highchair with harness

An infant highchair comprising:

• a seat comprising a backrest with an internal chamber, the backrest defining an aperture to the internal chamber on a front side of the backrest, and a locking mechanism positioned at the aperture, the backrest comprising an internal channel with an inlet and an outlet on the front side of the backrest;
• and
• a harness having a first shoulder strap and a second shoulder strap positioned to come together at the locking mechanism, the first shoulder strap and the second shoulder strap having a portion extending through the aperture into the internal chamber, the locking mechanism configured to lock the first shoulder strap and the second shoulder strap portion in the internal chamber, the harness comprising a waist strap having a portion extending through the internal channel.