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. y L*LJ  
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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? h^}_YaT\  
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this is the initial list I am working off: Pj'62
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london Mv|vRx^b  
paris p1+7<Y:  
Rome |y.zocBj  
Venice |<sf:#YzY&  
Florence ? K!GUv{fp  
Viena S[vRw]*  
Prague EPc!p>  
Berlin ? fD'/#sA#'  
Zurich UM<@t%|>  
Madrid ? `)"tO&Fn  
Lisbon ?  ylk{!  
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too aggressive? GGH;Z WSe  
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Thanks in advance