Walk-On-Me Plant is a creeping thyme that grows only 3" tall. (Also called Mother of Thyme). Plant around flagstones or for a decorative, dense-growing ground cover. Walk on it and the whole area will be filled with the aromatic smell of fresh thyme.
Sensory Gardens: "Use plants that play on the senses, such as fuzzy lamb's-ear, textural succulents, or fragrant lavender." (though not many eat it, lamb's ear leaves are edible, and most fleshy succulents are edible)
Money does grow on trees...and on bushes and vines and groundcovers, too. With edible landscaping, saving money never looked and tasted so good! http://www.bhg.com/gardening/vegetable/vegetables/edible-landscaping/?socsrc=bhgpin042415ediblelandscapin