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 hd#:d  
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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? %Ip*Kq-  
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this is the initial list I am working off: W/fuKGZi_  
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london y7/F_{  
paris QA3/
 
Rome "ZrOrdlg+A  
Venice E{E0Z9t7&  
Florence ? .iG&Lw\,  
Viena j8Cho5C  
Prague S<`I Jpkv  
Berlin ? W$0^(FH[  
Zurich ,ho3  
Madrid ? 'n;OB4  
Lisbon ?  HCWNo  
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too aggressive? V5i*O3a~  
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Thanks in advance