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. (Nt[v;BnO  
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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? 9H$g?';  
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this is the initial list I am working off: E*4t8  
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london 75(W(V(q  
paris >6K4b/.5w  
Rome {(HxG4~  
Venice M]0^ind  
Florence ? </w7W3F  
Viena G^"H*a  
Prague XqFu(Lm8=  
Berlin ? <lx^aakk!  
Zurich eJf>"IF-  
Madrid ?
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Lisbon ? xT+ ;w[s  
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too aggressive? UT-ewXh  
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Thanks in advance