US$ 27.91
champion varsity mini backpack Kids' Merit with Padded Straps, Water Bottle Pocket and Laptop Compartment for Daily Use, Pink/Black, One Size Spot clean Space Cadet 40 Sleeping Color:Denim Blue EQUIPMENT|BAGS & NON-APPAREL
Space Cadet 40 Sleeping Bag - Infant 8-24M
The carry rig is really comfortable
EQUIPMENT|BAGS & NON-APPAREL
Color:Denim Blue
Anything more than that will limit the number of things you can carry because most airlines also have restrictions on baggage weight
Spot clean