Pirate party (CH42 Birkenhead)

Hi I work in a small community nursery in the middle of Vale Park. The pre school are called pirates and we love to give them a fabulous party next week. I was wondering if anyone had any pirate costumes, hats, inflatables, flags, chest, anything pirate related that would transform their classroom and be suitable for 4 yr olds. We would be very grateful for any help. Thank you for reading.