"Bring me glue, scissors, paper, and one hundred pounds of gelatin." is a sentence because it contains a subject and a verb and expresses a complete thought. You may say that there is no subject here, only a verb (bring). However, this passage is an imperative sentence, which means it gives a direct command. The subject in imperative sentences is implied (you):
"(you) Bring me glue, scissors, paper, and one hundred pounds of gelatin."
