* The: Definite article
* very: Adverb (modifying "small")
* small: Adjective (describing "child")
* child: Noun (subject of the sentence)
* had: Auxiliary verb (part of the past perfect tense)
* eaten: Past participle (main verb, completing the past perfect tense)
* lunch: Noun (direct object of the verb "eaten")
* in: Preposition
* the: Definite article
* kitchen: Noun (object of the preposition "in")
Let me know if you'd like to analyze another sentence!