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. M_V\mYC8I  
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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? c"%XE#D  
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this is the initial list I am working off: %@L(A1"#D  
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london __""!Yz  
paris lY_E=K]  
Rome + )?1F  
Venice 0fnd9`N!0  
Florence ? XpWqL9s_E  
Viena q('O@-HA  
Prague -IJt( X|  
Berlin ? g% :Q86u  
Zurich 3Juhn5&N  
Madrid ? -p`hevRr  
Lisbon ? $=n|MbFl  
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too aggressive? w,]cFT  
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Thanks in advance