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. 9uY'E'm*  
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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? E7hhew  
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this is the initial list I am working off: )jj0^f1!j  
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london llDJ@
 
paris
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Rome 6zkaOA46V  
Venice 0x7'^Z>-oe  
Florence ? }G=M2V<L  
Viena dx]>(e@(t{  
Prague kza5ab
 
Berlin ? ^8tEach  
Zurich !k%#R4*>  
Madrid ? R]dg_Da  
Lisbon ? )"LJ hLg  
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too aggressive? l:% GH  
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Thanks in advance