Lift is a natural sign. Hold both open hands in front of you with palms facing up. Stoop forward slightly then straighten your back as you motion to lift something invisible with your open hands. It is as if you are lifting something off the ground or surface in front of you.
Teach your toddler the lift sign in the context of actions specific to taking, carrying, or leaving an object somewhere.
Teach your toddler this sign in conjunction with related flash cards like carry, bring, heavy, and leave.