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. [0%yJH  
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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?  <?>I\  
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this is the initial list I am working off: tAb;/tM3I  
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london t5ny"k!  
paris B&%L`v2
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Rome 7~!I2DV_  
Venice 36kc4=  
Florence ? zx\.2<K
 
Viena l#2r.q^$|  
Prague 6o[0sM_];  
Berlin ? ,-cpsN  
Zurich 8Z9MD<RLw  
Madrid ? oglXW
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Lisbon ? u|_LR5S!j  
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too aggressive? h"Vp
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Thanks in advance