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. )CTM  
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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? wef^o"aP  
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this is the initial list I am working off: `ha:Gf
 
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london RL)3k8pk  
paris ti2_kYq  
Rome ASU\O3%%  
Venice "8 mulE,  
Florence ? y$Noo)Z  
Viena >^ar$T;Ys  
Prague _Cs}&Bic_  
Berlin ? *w,gi.Y3  
Zurich -Dm .z16  
Madrid ? "{xv|C<*n  
Lisbon ? |6Z MxY  
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too aggressive? E.bbIV6mQ  
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Thanks in advance