The Museum of Science sits right on the Charles River and packs in a huge range of exhibits covering everything from dinosaurs and ancient civilizations to robotics, weather, and the human body. Expect a full day of hands-on activities, live demonstrations, and an IMAX theater if you're into that. It's genuinely engaging for kids but also interesting for adults who like science without the school vibe. Crowds can be heavy, especially around school groups, so the experience works best when you can move at your own pace.
Best time to visit is weekdays in fall or spring to avoid both summer vacation hordes and winter cold (though the building is indoors). Expect to pay around $35-55 per adult including one special exhibit or theater ticket; families should budget $150-200 total. Add another $10-15 each if you want the planetarium or a second IMAX show.
Honest tip: prioritize the dinosaur hall, the live animal shows, and the interactive engineering area; skip the outdated lower-level exhibits and anything that feels too much like a school field trip. Get there at opening if you can - the first two hours are noticeably less chaotic.