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. g4y&6!g  
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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? [FZq'E"87  
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this is the initial list I am working off: 8Wo!NG:V5  
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london dvM%" k  
paris <kk!nsI  
Rome K $WMrp  
Venice s\< @v7A  
Florence ? (I#mo2  
Viena 1Ko4O)L]&  
Prague *I[tIO\  
Berlin ? G)q;)n;*=  
Zurich G+2 ,x0(  
Madrid ? ~6K.5t7  
Lisbon ? 3~{0X-  
K)  Ums-b  
too aggressive? Dr76+9'i  
A+
j!VM   
Thanks in advance