Yes, MOUSETRAPS is a Scrabble word!

Letter values in Scrabble US: M 3, O 1, U 1, S 1, E 1, T 1, R 1, A 1, P 3, S 1.

Is it a valid word?

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

a trap for catching mice
(American football) a play in which a defensive player is allowed to cross the line of scrimmage and then blocked off as the runner goes through the place the lineman vacated

Also: trap play.