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. *D`,z3/*  
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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? `~*q
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this is the initial list I am working off: i8A5m@,G  
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london J7mT&U&Ru  
paris F,4Q  
Rome lOZ.{0{f,  
Venice NO6.qWl  
Florence ? Tm`QZh3  
Viena ~;U!?  
Prague VEz&TPu  
Berlin ? {Y\hr+A  
Zurich >~XX'}  
Madrid ? {!E<hQ2<$9  
Lisbon ? 'jmcS0f -  
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too aggressive? y .mojx%?a  
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Thanks in advance