A revolution for traveling light: the Doona stroller from birth to 18 months ️ Important safety instruction: A child must always be under the close supervision of an adult when in a stroller. Always use the safety harness, adjust it correctly, and follow the manufacturer's instructions. Never leave a child unattended in a stroller, especially when it is stationary. Also, ensure that the stroller is properly unfolded, locked, and stable before placing the child in it.