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. RP(a,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? u7n[f@Eg,%  
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this is the initial list I am working off: q[Vi[b^ F  
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london U>in 2u9  
paris k)|'JDm  
Rome hR!}u}ECd  
Venice /%5_~Jkr,  
Florence ? T!1SMo^  
Viena 5cgo)/3M@}  
Prague {v,{x1  
Berlin ? YsZ {1W  
Zurich ' *}^@[&  
Madrid ? bI#<Ee0nJ  
Lisbon ? .#sz|0  
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too aggressive? W _J&M4  
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Thanks in advance