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. Z@Z`8M@Q,  
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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? ) FsSXnZL  
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this is the initial list I am working off: =hb87g.  
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london KAaeaiD  
paris s_+XSH[=f  
Rome :H k4i%hGk  
Venice >}tG^)os  
Florence ? |/ 7's'  
Viena 1e%Xyqb  
Prague ImW~J
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Berlin ? u
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Zurich D*b|(Oi  
Madrid ? ? =Qg  
Lisbon ? a,\u|T:g  
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too aggressive? %Q01EjRes  
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Thanks in advance