Yes because "the box of toys has been tipped over" and "the children will pick it up" can stand on their own, and since they are combined into one sentence it is a compound sentence.
Answer:
Adjectives are words that modify nouns. They are often called “describing words” because they give us further details about a noun, such as what it looks like (the white horse), how many there are (the three boys) or which one it is (the last house).
hope that helps
