Backpack
Salient Features: Backpacks have straps and zippers.
Bus
Salient Features: School buses have a tall door, rows of windows on each side, and wheels.
Door
Salient Features: Doors are shaped like rectangles. They have hinges and a nob or handle to push or pull.
Table
Salient Features: Tables have a flat surface top and four legs.
Book
Salient Features: Books have a cover, pages, and a spine.
Swing
Salient Features: Swings have a seat and chains.