I have 10 week old twins and I'm trying to get them to sleep in their cots in the day (as opposed to car/ pushchair). What I don't understand though is at night they seem to sleep in their cots quite happily but won't in the day? We put them to bed at around 9ish and they will coo & grumble a bit until they fall asleep. Ive tried to let them fall asleep like this in the day but they just cry & won't sleep. They have blackout blinds & blackout curtains in their room, so I don't think it's the light that's making a difference. Does anyone know why they are so different at night to the day & will they eventually sleep in their cots in the day? Or will I have to sleep train when they're older? Thanks