Organizing Toys

First, I prepare 3-4 large container/boxes. Then, I sort all toys according to types (balls, soft toys, miniature vehicles, puzzles, etc). Divide each type into the boxes equally, more or less (for 8 balls, each box will have 2; for 12 soft toys, each box will have 3). So at one time, only 1 box will show up and keep the rest in the store room or anywhere out of their sight. The box will rotate weekly or monthly or when they get bored.