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. R^
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S`oADy  
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? v2e*mNK5  
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this is the initial list I am working off: {8)Pke  
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london X|}yp|  
paris =/Ob kV Yf  
Rome "lcNjyU\ O  
Venice b]'Uv8fbF  
Florence ? DD3.el}6a  
Viena #,0PLU3%  
Prague cnQ;6LtFTz  
Berlin ? B>&Q]J+

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Zurich +*2]R~"M  
Madrid ? l,n0=Ew  
Lisbon ? x=g=
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too aggressive? T
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Thanks in advance