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. sI`oz
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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? o[aIQ|
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this is the initial list I am working off: bKQ_{cR  
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london V|)nUsU  
paris r#B{j$Rw   
Rome #D^(dz*  
Venice #B5-3CwB  
Florence ? C}]143a/Q  
Viena "0m\y+%8  
Prague "10.,QK  
Berlin ? 8=-#LVo~c  
Zurich />O.U?  
Madrid ? qPn!.m$/  
Lisbon ? tN0?  
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too aggressive? 8qwPk4  
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Thanks in advance