During spring break we were in Barcelona, and we took the children to the Science Museum, called CosmoCaixa. I really recommend it! As a child, I used to love going there with the school. A lot of things have changed since then, and the building was totally renewed in 2004.
It is very entertaining, not only for the children, but I think also for the parents. One advice: do not try to watch it all if you have small children! By the way, can you guess what is going on in the picture below?
I recommend the area with the replica of the Amazon rainy forest, since children tend to love animals. The fishes are impressive!
And if you need to take a break or eat a snack, just go outside. In the picture below, we were playing with the antennas, placed about 30 meters from each other. One person has to talk into one, and the other one can listen to what is being said through the other antenna. Quite cool!
I hope you will enjoy this as much as I did!