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. `
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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? o1u?H4z  
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this is the initial list I am working off: lhJZPnx~  
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london Tw
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paris )dI `yf  
Rome 5x' ^.$K >  
Venice XE :JL_  
Florence ? n7'X.=o7  
Viena F2mW<REg{  
Prague uJL[m(G  
Berlin ? ^9oJuT!tu  
Zurich etH]-S  
Madrid ? "A&HNkRz  
Lisbon ? Np R&`]  
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too aggressive? R"[U< ^  
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Thanks in advance