I think the trip to Koh Larn is one of must-do things when you are in Pattaya. I suggest buying a ticket like normal people did at thb 30 and it takes around 40 minutes only so you see how kids go back home, sellers sell reasonable things and all teenagers go day-trip there. The view along the trip is fabulous and when you reach Koh Larn stop, please rent a motorcycle and ride around every beach! All great but not to be missed Ta Waen, Nuan, Tian and Samae beach! Affordable price, great experience! You'll love the experience!