Do not go to MOSI!
MOSI is not worth your time, broken exhibits, poorly arranged and not maintained. The museum is huge, but that doesn't mean it should be filthy, yuck, dust, hand prints everywhere, I don't want to talk about the cafe, shudder.
For the price, $25, you would expect a lot more, good grief. The staff is clueless, the volunteers look bored no wonder really when you look around at all the boring things to do.
The place has potential to be great but it seems that management doesn't care about the place, if they did it would be clean at least. From what I have heard the CEO Wit Ostrenko makes $230,000 a year - question is where is that money going, certainly not where it belongs.