This would be a cute kids planter idea! Marigolds and Johnny Jump Ups for a kid friendly edible garden. Or even a planter for the chicken yard with wheat grass and Marigolds! I better start saving those cans!
Brick pavers make a simple, handsome border and work well as edging material. They're ideal for a wide border that keeps grass out of the garden, yet allows flowers etc. to spill over without intruding onto the grass.