We're celebrating summer by giving you the chance to win a fabulous hamper full of office supplies! It's really easy to take part, all you need to do is guess the mystery sound to be in for a chance to win. Just play the video below, listen for the sound and write your answer in the box!

"What could I win?" we hear you ask, "LOTS OF STATIONERY!" is our reply! What are you waiting for? Enter for your chance to win!

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