Past participles serve as post-positional attributive clauses: In "tidying up their rooms," "tidying up" as a past participle phrase is used as a post-positional attributive clause, explaining the specific tasks children can do, enhancing the information and complexity of the sentence.
Present participles function as adverbial clauses: In "learning responsibility" and "contributing to the family," using present participles as adverbial clauses describes the experiences and growth children gain through participating in household activities, increasing the descriptive and complex nature of the sentence.
Adjectives serve as predicate complements: Following "is good for," the adjective "good" serves as a predicate complement, describing the positive impact on children's growth and self-esteem, making the sentence more complete and expressive.