My daughter complains that they have too many toys and games so she came up with a a great solution. She has a rule, for every new toy, new game, new doll, etc., they have to pick one to give to tzedakah. That way they never have an overflow that gets out of control and the kids are involved in doing chessed.
I also wanted to mention that it is important to get into a bedtime routine so the kids know what is expected of them and they know the routine. But you have to be involved in that routine and be committed to it if you want it to work You can’t just expect them to do it because you tell them to and not do it with them because you are tired. I know this isn’t easy especially as you get older and you have already been through this with your oder kids, but if you keep having kids, they are as entitled to your attention as your first was. Children need their parents to help them settle down and get into the bedtime mood. They love to have you there when they brush their teeth and say Shema, and if they can actually do that within a good time frame, what would be better than Mommy reading them a bedtime story. Eventually, they will do some of this on their own, and maybe your older kids and hubby will take turns with you or help out at bedtime.
You also have to decide when a child keeps climbing out of the crib if it is better to put her in a bed than have her risk falling down. You can start with a mattress on the floor or go straight to a bed with a safety bar.