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. ,<U= 7<NU  
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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? "z{/*uM2<  

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this is the initial list I am working off: Pvc)-A  
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london dPEDsG0$a  
paris -TF},V~  
Rome FOQ-KP\=,  
Venice ESCN/ocV  
Florence ? sfX~X/  
Viena gy}3ZA*F  
Prague #kv9$  
Berlin ? k+9F;p7  
Zurich 8J3#(aBm  
Madrid ? mD9Iao%4~  
Lisbon ? q-(~w!e  
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too aggressive? .b,\.0N  
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Thanks in advance