Yes, PUPPETS is a Scrabble word!

Letter values in Scrabble US: P 3, U 1, P 3, P 3, E 1, T 1, S 1.

Is it a valid word?

PUPPETS is a valid word in the official Scrabble dictionary (US), the UK Scrabble Dictionary and Words with Friends (ENABLE).

a small figure of a person operated from above with strings by a puppeteer
a person who is controlled by others and is used to perform unpleasant or dishonest tasks for someone else
a doll with a hollow head of a person or animal and a cloth body; intended to fit over the hand and be manipulated with the fingers