Dogs resemble young children in many ways (smart dogs, that is). For one thing, it’s hard to communicate with them and understand what they’re asking for, but most of the time, it’s either food, going out for a walk, or just seeking attention. Rizzo here resembles children in another way; she likes to play with toys, and she even has a habit of filing them neatly.
We don’t know why she feels the need to file her toys, and neither does her owner, but we think she should be thankful either way. It doesn’t really matter why Rizzo does what she does; the important thing is the house is always tidy and organized, rather than full of toys sprawled about, and Rizzo is happy.