Baby floor seat with adjustable harness, 3 months and up ️ Important safety instruction: A child must always be under the constant and attentive supervision of an adult when placed in a high chair or booster seat. Always use the restraint devices and safety harnesses, where provided, and ensure they are correctly adjusted. Never leave a child unattended, even for a few moments. Also, check that the high chair or booster seat is correctly installed, stable, and secure before placing the child in it.