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. s':fv[%  
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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? sDV*k4  
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this is the initial list I am working off: B-63IN  
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london ~_vzss3-C  
paris ppcuMcR{  
Rome qta^i819  
Venice `? ayc/TK  
Florence ? wm@/>X  
Viena =X6+}YQ"  
Prague z0ULB?*"  
Berlin ? C:C9swik"5  
Zurich HA}pr6Z  
Madrid ? cZ$!_30N+  
Lisbon ? 6*@\Qsp615  
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too aggressive? :/e=J  
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Thanks in advance