This idea is brought to us by Little Green Fingers, a site dedicated to getting little ones involved and interested in gardening.
Simply write each of your garden's contents on the head of a wooden spoon. Stick the handle side in the soil and - voila! - you have quaint labels made of spoons that might not otherwise see much use (especially if you have an overabundance of wooden spoons at home).
(Images: Little Green Fingers)