Tatooine obviously. What can I say, I love sand. Whats not to love? It's coarse and rough and irritating and it gets everywhere. I freakin' LOVE IT!
The 3 items I would bring would be a bucket, a shovel and some sunscreen.
LOL! I feel like your3 items make it sound like you just want to build sandcastles? If that's the case you might want to ditch the sunscreen and bring some water.
I'd go to Naboo, Everything there is soft and smooth. My three items would be some sand, some blue milk and and a crazy old wizard.