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. o{
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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? S(gr>eC5  
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this is the initial list I am working off: |Xt.[1  
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london 5W&L6.J}+  
paris #`VAw ) eV  
Rome I0m7;M7 P  
Venice danPy2  
Florence ? 8ymdg\I+L  
Viena ?()*"+N(ck  
Prague 39v Bsc  
Berlin ? ,"EaZ/Bl/  
Zurich e9{ii2M  
Madrid ? y98FEG#S}  
Lisbon ? }J#HIE\RG  
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too aggressive? ^&qK\m_A  
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Thanks in advance