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. !p+54w\ 2  
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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? }`gOfj)?i  
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this is the initial list I am working off: }. &ellNQ  
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london ?=9'?K/~a  
paris hnFpC1TO  
Rome qt}M&=}8Q  
Venice )I&.6l!#  
Florence ? 8;?4rrS  
Viena &Pb:P?I  
Prague ./ {79  
Berlin ? p XXf5adl<  
Zurich N`Q.u-'   
Madrid ? 8</wQ6&
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Lisbon ? e%cTFwX?n  

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Thanks in advance