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. ]6?6 k4@  
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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? wvEdZGO8!  
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this is the initial list I am working off: oMb@)7
 
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london V.kf
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paris Uj)`(}r  
Rome yT C+5_7  
Venice ^ r 9  
Florence ? K!|J/W  
Viena 7MwS[N%#  
Prague TDW\
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Berlin ? _VLA2#V>  
Zurich PCiwQ4 ~  
Madrid ? @VKN6yHH  
Lisbon ? AbOF
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too aggressive? lD1m<AC  
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Thanks in advance