Toys on offer from the recently expanded Sears online toy shop and Kmart's Fab 15 Christmas toy list will feature on the walls.
Each product will have a QR bar code, which can be scanned with a smartphone to buy the product immediately.
The walls will be located temporarily in malls, bus shelters, subway stations, airports and cinemas.
Julia Fitzgerald, chief digital engagement office of toys and sporting goods for Sears, commented: "Our mobile shopping walls are not only convenient because of their unexpected locations, but they offer easy shipping options as well,
"Our goal is to make holiday shopping so simple that customers can find the perfect gift while they are traveling or going about their daily lives."