My 3 year old nephew was entertained for the time we were there but mostly on the playground. We could've taken him to a playground for free. Its best for bigger kids that have a longer attention span.
I would say that a 4 year old might be enough for and hour or so. At the cost of admission, you would be better elsewhere.
They are in the process of moving MOSI to Channel Side. There is only one section left which is the hands on science stuff for the kids. It's fun, but my kids 5 and 7, they went through it in an hour 1/2 and were ready to go. Save your money and find something else to do. Hope this helps.
Ive never been to the other place but Mosi kept our two yr old entertained for hours even though he didn't grasp the concept of most of it. I think a 4 yr old would do well there. Just know its one big area with alot of stuff but theres also add on activities you have to pay separately for
Plenty to see for your child.
It would be great for a child atm
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