Indoor

A small aquarium right on the River Walk built at toddler eye level, with a walk-through ocean tunnel where rays and sharks pass overhead. Touch pools let kids handle sea stars and anemones under supervision. The route is short and one-way, roughly an hour, which is a feature rather than a flaw with preschoolers. Its location inside the Shops at Rivercenter means you can duck in from a downpour without moving the car. Good rainy-day filler between River Walk stops rather than a destination on its own.

The visitor center for NASA Johnson Space Center and the closest most kids will get to standing inside the real thing. A tram tour runs out to historic Mission Control and the astronaut training facility where hardware for current missions is actually being worked on. Independence Plaza lets you walk through a shuttle replica mounted on a genuine 747 carrier aircraft. Indoors there are moon rocks you can touch, a Saturn V rocket hall, and Apollo capsules. Book the tram early because slots fill and the queue is the one part that will test kids patience.

San Antonios purpose-built childrens museum and one of the newest in Texas, which shows in how well the spaces work. Kids climb a multi-story sensory structure, run a mock vet clinic and grocery, program small robots, and build circuits that actually light up. The Little Town area is scaled for toddlers with a market, a stage and a construction zone. Outdoor water play and a musical garden extend the visit on dry days. Two to four hours depending on how many times your kid loops back to the water tables.

A museum about the human body that is much less clinical than it sounds. The Amazing Body Pavilion walks you through a giant heart, a set of oversized organs, and a brain you can climb into, with sound and light effects the whole way. Kids see real preserved specimens, test their balance and reflexes, and try out surgical tools in a simulated operating room. It is smaller than the natural science museum across the park, which makes it a good second stop or a lower-stakes option with younger kids. Sits right in the Museum District so it pairs well with the childrens museum.

The best indoor family destination in upstate New York, full stop, and worth a drive from anywhere in the state. It is enormous: a walk-through Sesame Street set, a full arcade with classic cabinets, a butterfly garden, a working carousel, a Berenstain Bears house and the National Toy Hall of Fame. The 2023 expansion added a whole neighbourhood of new play worlds and an indoor skyline bridge. Older kids and teens stay engaged through the video game history halls while toddlers have their own zones. Budget a full day and expect to still miss things.

Austins childrens museum and the default answer when the weather ruins a Barton Springs plan. Everything is designed to be pulled, poured, built or knocked over, with a huge water play area, a light and shadow lab, and a maker studio with real tools. There is a separate space for babies and crawlers so the under-twos are not steamrolled by big kids. Outdoor backyard play space extends the visit on nice days. Two to three hours is realistic and there is a cafe on site when everyone crashes.

A real World War II submarine you go down inside and walk through end to end, which is the kind of thing kids talk about for years. The passages are genuinely tight, the bunks are stacked beside torpedoes, and an audio tour explains what life aboard was actually like. An adjoining indoor museum holds torpedoes, a Poseidon missile and submarine artifacts. It is at the Pearl Harbor visitor center so it slots in alongside the memorial and aviation museum. Not suitable for strollers and small kids need to manage steep ladders.

A small aquarium right on the Waikiki shoreline focused entirely on Pacific and Hawaiian reef life, which means kids see the same fish they might snorkel with an hour later. Hawaiian monk seals live in an outdoor habitat and are the highlight for most children. There is a giant clam collection, a jellyfish gallery and a shallow outdoor touch tank. The whole visit runs about an hour and it is walkable from most Waikiki hotels, which makes it an easy rainy-morning pivot. Partly open air, so a poncho helps in a real downpour.

A natural history and Texas heritage museum on the edge of Brackenridge Park with a strong dinosaur hall and a lot of hands-on space. The Naylor Family Dinosaur Gallery has mounted skeletons and a dig area, and the McLean Family Texas Wild Gallery covers the states ecoregions with taxidermy dioramas kids can get close to. The four-story HEB Body Adventure is essentially an indoor obstacle course about how bodies work. Riverside outdoor areas and a treehouse-style science center add more if the weather holds. Easily a half day.

An indoor science-and-play attraction inside the Destiny USA mall, built around illusion rooms and physical challenges rather than quiet exhibits. Kids lie on a bed of nails, ride a bubble-wall, experience a hurricane simulator and try an anti-gravity chamber. A ropes course and laser tag are usually included or available as add-ons. It is loud and gimmicky in the best way and burns a lot of energy on a snow day. Being inside a mall means food, restrooms and a dry walk from the car are all sorted.

A world-class museum campus spread across 121 acres on the shore of Blue Mountain Lake that tells the story of the Adirondacks through interactive exhibits, historic buildings, and outdoor experiences. Kids love the Life in the Adirondacks exhibit, the rustic log hotel, and the working blacksmith shop. The campus includes a boathouse with historic guideboats, an indoor nature exhibit, and walking trails along the lake. Plan for at least half a day as there is far more here than you would expect.

A world-class aquarium focused on Hawaii marine life with a 750,000-gallon open ocean exhibit you walk through in an underwater tunnel. Kids are transfixed by the sharks, rays, and tropical fish swimming overhead and all around them. Touch pools let kids handle sea stars and sea cucumbers. The exhibits are organized by habitat from shallow reef to deep ocean. A turtle lagoon features rescued Hawaiian green sea turtles. The Sphere is an immersive 3D whale experience. This is the best rainy-day option on Maui and worth a visit regardless of weather.