Finding a better way to organize the toys

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I have made our master bedroom as the children's play room, as we are sleeping in another bedroom. I also ask the children to play in the play room as much as possible, so their toys won't be all around the house, especially the living room. I have been trying hard to minimize and organize the toys and also get the children to pick up the toys, but it just doesn't seem to work out nicely. I have thought of locking the play room, and I am sure the children can still find things to do throughout the whole day, but I just do not feel like being the joy killer always. I can't really blame the children for not very helpful in picking up the toys, as there is really very messy after they have played for the whole day usually and we do not have a good "toy picking up system" yet. I am thinking how I can set up a better way to organize the toys, so the children can learn to pick up toys on their own, or spend lesser time with my help. I feel tired keep cleaning, picking up and organizing things now. Perhaps it's my nature to be messy, and the kids just pick up my bad habit, though I like to organize things actually. I am glad I have been keeping calm and not scolding my children, but I just feel tired and know that I really need to find a solution for this. If you have kids at home, how do you organize the toys? Or is there any "toys system" in your house that helps? Sorry for my venting. I feel better now, and it's time to go to the park!