DS (nearly 3) has just worked out how to climb out his cot, so has been moved to a cot bed. He usually chats and sings to himself in his cot for about 20 mins before going to sleep, however, he is now (predictably) constantly getting out of bed instead. I've been quietly putting him back into bed every 30 seconds or so for half an hour, however, 8 month old DD desperately needed feeding so I had to allow him to get up to feed DD. I know this will make things worse in the long run 
Someone tell me this gets better, and if you have any magic quick fixes, let me know!