Things you will need for carnival are as follows:
Reusable Party Cup - Also known as a reusable water bottle. Cannot stress enough how important this is. Carnival is a daylong event which takes place in the sun and so you will need to keep hydrated.
Comfy Shoes - Ladies and gentlemen I'm not sure if you were aware that carnival is about walking, dancing and drinking on end. It sounds fun, I promise. But comfy shoes are necessary to endure.