Something I do (because my littlest at 16 months gets tired before the eldest) is just slowly introduce cues - of course you can't just jump into a full blown system without some sort of freak out! So I started off with him going into his cot at around 7am and having a little quiet 'play' i.e. a few soft toys, books and his fave things, as he was an avid co-sleeper and didn't like the cot at all - it was tears all around if I tried to get straight into the cot. Once he was happy in there, I started working on sleepy things like singing and patting. He now knows when I say, 'Lie down Lijie' that he can lie down and I will still be there to sing / pat. He's gotten great at going down in the cot and it's only taken a couple of weeks, the problem is the older one interrupting. So if she is kept busy with colouring or watching a DVD while I settle and get the routine going for Elijah, then all is great. Then she goes through her routine a little later being almost 4, but it's all age dependant of course. So slowly, fun, and gentle is definitely the way to make bedtime fun and easier, I think... he now tends to get tired around the same time and it's been great. I also found taking them both for a walk after dinner helps burn that extra energy and they both go down much easier. It is so hard on your own, isn't it...?