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. $,"{g <*k;  
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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? [
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this is the initial list I am working off: fo~8W`H&  
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london ^ a%U *>P  
paris yO.3~H)c  
Rome opTDW)  
Venice (.\GI D+i  
Florence ? iA*Z4FKkT  
Viena ) ?rJKr[`  
Prague 32jOs|<\  
Berlin ? yZ3/Ia>,  
Zurich 1L1_x'tT%  
Madrid ? 3nv7Uz  
Lisbon ? <y5V],-U  
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too aggressive? iK{q_f\"  
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Thanks in advance