Sentence 1: Shelly's aunt had sent her a nice package. 
 Sentence 3: When Shelly wasn't looking her children dug into the box 
 Sentence 4:  Soon there were bits of styrofoam all over the place 
 Sentence 5:  It took Shelly weeks to clean and still little pieces were left 
 Option 1: Inside the box was a ton of packing styrofoam. 
 Option 2: It had a book in it.