Actually at this age, you will put your infant at risk because he/she is still a wet bone, so avoid sitting him at this age. but there is a special chair for infants between the ages of one month and 9 months, but this outdoor infant seat is not designed to sit. this chair is designed in the shape of a half egg which you can put your infant inside and it has space to move and sleep. To know more about this outdoor infant seat check here on amazon