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. 7 &y'\  
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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? 
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this is the initial list I am working off: aS ]bTYJ'  
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london Up:<NHJT  
paris ,>

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Rome
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Venice pLB~{5u>;-  
Florence ? E-P;3lS~  
Viena cg16|  
Prague xcBV,[E{  
Berlin ? lX^yd5M&f  
Zurich 3q{op9_T7  
Madrid ? W4 v/,g>  
Lisbon ? u9-:/<R#}y  
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too aggressive? )tB:g.2k  
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Thanks in advance