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. t=X=",)f  
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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? 0@!huk  
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this is the initial list I am working off: 0zA;%oP  
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london er5!ne  
paris HAL\j5i  
Rome <5D4h!  
Venice up+0-!AH  
Florence ? Y6&v&dA;  
Viena f=k#o2  
Prague =.7tS'  
Berlin ? IA<>+NS  
Zurich HHZw-/s,%  
Madrid ? "0uM%*2  
Lisbon ? AmHj\NX$  
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too aggressive? "9r$*\wOf  
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Thanks in advance