For a morning on the island, start with [Morning] Koh Larn Half Day Tour. This half-day trip to Koh Larn runs in the morning, and the dry season's calmer water means less risk of rough seas or a cancelled crossing.
For a first look at Pattaya on a short trip, Pattaya Highlights Half Day Tour covers the town's main sights in half a day, which fits well into a morning or afternoon early in a three-night trip.
For one standout day of the holiday, compare Luxury Pattaya Yacht One Day Tour (Shipyard); for a half-day that works for both children and older parents, look at Pattaya Nongnooch Village Half Day Tour. The yacht tour runs over calm dry-season water, while Nong Nooch pairs gardens and a show without demanding much walking.
If you need a pace suited to young children, New Khao Kheow Open Zoo Private Taxi Tour uses a private vehicle; if you have visited Pattaya before, Pattaya Free Tour lets you build a custom full-day itinerary around your own picks. Both run privately, which gives more flexibility than a group tour.
For more time on the island than a half day allows, compare Beach Club Koh Larn One Day; for a change of pace from the water, ATV Pattaya Jungle Adventures adds an off-road half-day experience. The beach club day makes the most of calm dry-season water, while the ATV tour offers a different kind of activity.
Before booking, check included meals, pickup times, minimum group size and whether the tour runs privately or in a group. Tour demand rises during Christmas week, so book your preferred date and time ahead of the trip.