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. .?_wcp=  
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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? :4<+)r26  
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this is the initial list I am working off: V_~}7~ I  
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london 4G@vO{$  
paris W2yNEiH  
Rome <= cj)  
Venice Q]w;o
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Florence ? "(/|[7D)  
Viena Xe*@`&nv@  
Prague ,^,Vq]$3  
Berlin ? ?qw&H /R  
Zurich -t?S:9[w  
Madrid ? 1
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Lisbon ? Nt&}T   
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too aggressive? . %tc7`k8  
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Thanks in advance