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. ,w|f*L$  
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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? td@
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this is the initial list I am working off: Y8I$JBO  
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london 6&=xu|M<x=  
paris (lhbH]I  
Rome =:U63  
Venice (9h{7<wD`  
Florence ? h:[PO6GdX  
Viena Dg]ua5jk  
Prague VT 1W#@`e-  
Berlin ? 0px@3/  
Zurich )-824?Nl:  
Madrid ? DJeP]  
Lisbon ? "t+VF4r  
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too aggressive? 5= g{%X  
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Thanks in advance