Help needed! what to see in Europe with kids

I am taking my two daughters to see Europe first time this summer, most likely flying into London and hop on Eurail. two weeks is about what I can afford. JB HnJm  
d{DBG}/Yg  
I have noticed that a number of you are from Europe, can you please offer some suggestions on how best to plan our trip? what will be interesting for girls around 10 years old? 'h 7n}  
t}gK)"g  
this is the initial list I am working off: xt8@l [Z  
m^4Ojik  
london ]%UAN_T  
paris 9 'IDbe{  
Rome bjFND]p?w  
Venice jyC>~}?  
Florence ? #Q%0y^s  
Viena )T@+"Pw8t  
Prague |2&|#K4k^  
Berlin ? Q#Xa]A-  
Zurich dq3"L!0u  
Madrid ? }t
edh  
Lisbon ? Dm`gzGl  
/_r{7Gq.  
too aggressive? ?{>5IjL)en  
fw0Z- 9*  
Thanks in advance