As the kids get used to transferring their most important and beloved items from home to home, I find it helpful to provide them with cute, personalized luggage, like this Lillian Vernon Pink Polka Dot Rolling Luggage ($60). In our house we call these the "dad bags" and I am constantly reminding my kids to "put that in your dad bag!" It helps minimize those dreaded last minute drop offs of any items the kids left at my house, but so desperately need at their father's!