Florence is not a town for adult people…
there are many activities can be done and museums can be visited by and with kids!!!
First of all I suggest you to visit the website of the Tourist Agency of Florence which is always updated:
http://www.firenzeturismo.it/en/everybody-goes-to-the-museums/
Then, I suggest you to visit the “pizza and ice-cram(!)” section of this website: http://personalconciergeflorence.wordpress.com/restaurants/pizza-and-ice-cream/
Here you will find a list of few shops between our toys stores for children:
La città del sole – via dello Studio, 23/r
Bartolucci – via della Condotta, 4/r
Dreoni – via Cavour, 31-33/r
and of course, the Disney Store in via dei Calzaiuoli, 69/r
Last but not least, a couple of Museum suggestions:
Palazzo Vecchio
http://www.musefirenze.it/en/museums/kit-families/
Museo dei Ragazzi – Children Museum
http://www.museoragazzi.it/ – website to be renovated soon
Museo Galileo – Science Museum
Museo Marino Marini – Museum of Modern Art
http://www.museomarinomarini.it/section.php?lang=eng&page=didattica
Museo La Specola – Natural History Museum
The Children can be interested in visiting the section “Zoolgy” in Via Romana, 17 and the section “Geology and Paleontology” in via La Pira, 4
http://www.msn.unifi.it/changelang-eng.html
The Planetarium
http://www.fstfirenze.it/en/planetarium
The Archeological Museum
http://www.archeotoscana.beniculturali.it/index.php?it/217/english