We also use, in DD's room, a Gro Clock - made by the Gro company (think Gro bag) they can be used to help toddlers understand when to wake and when to sleep - or stay in bed anyway I understand that DS is probably a bit little for that side of things (though we started DD when she was about 20 months) but it is also a great night light. Glows blue at night time. Look into that maybe.