I just had to have one of these and they work miracles! My son has never liked being in a room all by himself so getting him to sleep was such a fight. I started using this at nighttime even during regular day time naps and he slept like a charm. Its such a neat item that plays music and lights up when the room is dark. Its durable and safe to hang on the side of the crib, not having to worry about it falling and hitting the baby and the straps no it are durable not allowing a small child to pull down.