Classic Puzles - Party Time

Puzzle:
Several kids of varying ages brought things for the end of year party. Sheldon, who is 11, brought POTATO CHIPS. Margaret, who is 12, brought PINK LEMONADE. Peter, who is  9, brought PAPER CUPS. Sheila, who is the same age as Margaret, brought PARTY POPPERS. Newt, who is the same age as Sheldon, brought PAPER PLATES. Young Henry brought POPCORN. How old is Henry?



Henry is nine if he copied everyone else and brought something with the same number of letters as their age.