An indirect object is always a noun. An indirect object receives action indirectly. Sentences that already have a direct object can sometimes also have an indirect object.
Direct object sentence: Mom baked a cake. The direct object is cake.
Same sentence with an indirect object added: Mom baked Sam a cake. Sam indirectly receives the action.
Direct object sentence: John threw the ball. The direct object is ball.
Same sentence with an indirect object added: John threw Sarah the ball. Sarah indirectly receives the action.
More sentences with an indirect object:
Betty read me her essay.
Mom gave the dog some food.
Dad poured my sister some milk.
An indirect object is always a noun.
▶It’s your turn. Find the noun used as an indirect object in this sentence. Jim gave the cat a treat. That wasn’t hard was it?