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. Z;mDMvIu (  
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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? d|sI>6jD  
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this is the initial list I am working off: E|.D  
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london yMa5?]J
 
paris ;3_Q7;y  
Rome 4[&6yHJ^  
Venice , 0rC_)&B  
Florence ? GS3ydN<v  
Viena l9.wMs*`X  
Prague %t
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Berlin ? 7iKbd  
Zurich =kLg)a |  
Madrid ? t(MlZ>H  
Lisbon ? L3~E*\cV  
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too aggressive? jr:LLn#}  
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Thanks in advance