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. E=B9FIx~<  
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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? *?8Q:@:  
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this is the initial list I am working off: +X&B'  
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london YnMph0\Y^  
paris qd.b&i  
Rome sM4wh
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Venice >i.+v[)
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Florence ? aR\=p:%jGI  
Viena 6lhVwgy3A  
Prague #e
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Berlin ? }6KL  
Zurich +:t1PV;l  
Madrid ? h>n;A>k@N  
Lisbon ? Fivv#4YO  
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too aggressive? v3/cNd3  
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Thanks in advance