Let the bag set the limit
A moving-day bag works differently from the luggage carrying a child's clothes. It holds the belongings they may need while adults are occupied and rooms are being emptied. Choose a manageable size and check who will carry it when the child becomes tired.
Give the child a few defined choices within the available space. A favourite small toy, a book and something to draw with may be enough. An activity with many tiny pieces can become hard to use when there is nowhere to spread out or when departure happens quickly.
If the bag will also be used for a flight or another journey, check the relevant carrier and security requirements separately. The fact that something is helpful on moving day does not establish that it is permitted in every part of the trip.
Make the contents findable
Use a small pouch for loose items and keep anything needed quickly in an obvious pocket. Show the child where things are and let them practise opening and closing the bag. A familiar bag may be easier to manage than a new one bought for the occasion.
Keep essential documents and anything requiring adult oversight within the adult's arrangements. A child's bag can provide independence without carrying responsibility for something the family cannot afford to lose.
Choose snacks and drinks according to the child's needs and the day's arrangements, keeping them separate from books and clothing. A spare outfit can be useful if there is room; otherwise tell the responsible adult where it is packed.
Give it a protected place
On packing day, put the bags in a clearly marked area that is not being loaded with the shipment. Tell helpers that these belongings stay with the family. A distinctive tag helps, but a verbal handover still matters.
Before each departure, check the most important item rather than assuming the whole bag has been repacked. A favourite toy may have come out for play and stayed behind a sofa.
At the new home, let the child open their own bag first. It offers a small task they already understand while the larger household remains unsettled.
