The last time we were here our kids were much younger. The 4th floor is under construction. The other floors haven't changed. The floor that has a new exhibit is on "snow", showing foot wear and clothing etc. I think it is good to visit once and especially with young children. The children's area allows kids to travel around the world in an afternoon :) We did also see an IMAX it was pretty pricey for the two of them.
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