To sign land, take your flat, open hand and form a circle in the air, palm facing down, as if you are wiping the land in front of you.
An alternative sign for land is a lot like the sign for flat. Bend both open hands and hold them side by side. Then move your bent hands forward simultaneously, indicating flat lands.
Teach your toddler the land sign in the context of describing your property, garden, park, neighborhood, or city.
Teach your toddler this sign in conjunction with other land forms and nature flash cards.