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. ]mh+4k?b  
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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? ZM.g+-9  
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this is the initial list I am working off: ZSSgc0u^?  
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london R}Y=!qjYE=  
paris D-!%L<<  
Rome F{+`F<r  
Venice E;Hjw0M'k  
Florence ? BkeP?X  
Viena z~5'p(|@f  
Prague J)-> 7h=  
Berlin ? B;Z^.3  
Zurich Jp#cFUa t  
Madrid ? u5ygbCm  
Lisbon ? A%O#S<sa  
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too aggressive? qQ'@yTVN  
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Thanks in advance