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. |u@/,x
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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? gd,3}@@SH  
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this is the initial list I am working off: w{$X :Z  
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london {~y,.[Ga  
paris Bok
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Rome M#CYDEB  
Venice <| kS`y  
Florence ?  <j<V{Wc  
Viena -yJ%G1R  
Prague |l#<vw wE  
Berlin ? h't! 1u  
Zurich dU"ca|u  
Madrid ? -V_iv/fmM  
Lisbon ? j]X$7  
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too aggressive? p7{%0
  
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Thanks in advance