S.L.
Sometimes children at this age need a transition time. Time between the "up" of playing and the "down" of sleep. What I used to do was about 20 minutes or so before bed time, I would snuggle with him on the couch. Turn on something on PBS etc or a nonviolent show on tv( the white noise he needs) and he would cuddle up on my lap or beside me with a blankie and this would slow him down enough to relax and get ready for sleep. Sometimes he would actually just fall asleep on the couch. It eliminated the stress at bedtime for BOTH of us.
This will work too, as your daughter gets older. You can snuggle with both of them on the couch, one on each side of you. Gives you a little down time to catch your breath. If the tv is not an option, you can read them a book. This creates a love for reading at the same time.
By the way..he is fighting it because he is getting older and thinks he is mising something. This will happen many more times as he grows older. Next will come the "I need a drink of water, I need to go potty" phase LOLOL Just be sure when that stage comes..he gets his drink of water when he brushes his teeth and that he goes potty before putting him down. The more he sees you give in to those requests, the more he will use them LOLOL This is the hard stage because as a mother you WILL give in sometimes because you believe he is thirsty and you dont want him to wet the bed etc. Just hang in there, they do grow out of all of it. And before you know it they are adults
A little about me:
Mom to 9 kids ranging in age from 2-22