So. Much. Fun. The Exploratorium is basically a ma...

So. Much. Fun. The Exploratorium is basically a massive hall full of things to play with that are all explained by scientific principles. It may sound dry but it's not - I haven't had this much fun at an exhibition in ages, and would hugely recommend to everyone, not just kids. We visited on a Tuesday at 4pm and it was pretty quiet, I never had to wait more than a minute to play with things. The ratio adults to children was about 4:1 but I would imagine on school holidays and weekends that would change pretty drastically. The stop-motion Batman mobile is hilarious and I had so much fun with the slo-mo cameras and heat detectors.
Pro-tip: visit after 3, and you can use the daily ticket again the next day, so you can avoid exhibit fatigue (it kicks in after the 100th or so!) by spreading it over 2 days.