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. z`c%?_EK  
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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? KX0<j  
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this is the initial list I am working off: s>LA3kT  
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london F~tm`n8Z  
paris E%-Pyg *  
Rome d1UVv
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Venice
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Florence ? n/ui<&(  
Viena ,l rYl!,  
Prague kEp.0wL'  
Berlin ? }9{dR4hD  
Zurich 3
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Madrid ? 3Cq6h;!#  
Lisbon ? ,O$Z,J4VL  
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too aggressive? K#_~ !C4L  
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Thanks in advance