My kids (age3–7) all grasp the concept of the eyes opening and the different screen colours. They have been staying in their room reading books till the alarm goes off. They love the ‘bahh’ sound alarm. Subconsciously they are starting to sleep later than usual as they know they can't come out. There's a few niggly bits like having to set the sleep time every night and find the buttons quite stiff. I would definitely buy this product again.