My DS is 2.3 and I am due DC2 in about 6 weeks. DS currently sleeps in a cot bed but we need this for no2. He has a bed in his room as well and likes to climb in it and pretend to sleep but will not stay in it. Is it best just to keep putting him back in and hoping he gets the idea or any other tip please? Don't really want to have to buy a 2nd cot if we can avoid it