Disneyland Resort Hotel has a free shuttle bus service outside the Disneyland station. Make sure you’re getting on the right bus as there are 3 Disney hotels so 3 different buses. But if you have a small kid, better take a taxi from the airport instead of taking the train. Airport is on the same island as the Disneyland Resort so distance is not very far.

Description from HKDL : Outdoor Pool Are you ready to make a big splash? Continue your adventure after a magical day in the park, at our outdoor heated Pool. Take a dip in our beautiful 78,000-gallon heated pool, ride down the twisting waterfall-themed slide, or relax and lose yourself in a book on our cozy deck chairs. Whatever your heart desires, you’re sure to find it here. And with zero-depth entry, everyone can join the fun. Towels and lockers for storing your belongings are available at no extra charge. Pool hours, slide operating times, and lifeguard availability will vary according to the weather and are subject to change. Indoor Pool Escape to this 107-square-meter aquatic sanctuary inside for a more calming sojourn—or to simply swim laps. Recalling a luxurious, spa-themed watering hole from the turn of the 20th century, the heated indoor pool promises a soothing respite day and night—rain or shine.

The Lego Land in HK is located on the basement floor in a shopping centre (K11 MUSEA) in Tsim Sha Tsui. Not so much of an entire theme park. Take the MTR (subway), it’s much more convenient than taking a bus. Download the MTR mobile app and it’ll tell you which route to take.