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. DN8pJa  
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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? ^n45N&91 6  
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this is the initial list I am working off: r4NT`&`g?  
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london 1uge>o&  
paris ,^IZ[D>u)  
Rome Ze
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Venice _g`0td>N  
Florence ? 2-E71-J  
Viena /L|}Y242  
Prague qVRO"/R  
Berlin ? LjQ1ar\  
Zurich K!: ,l  
Madrid ? (z1%lZ}(  
Lisbon ? g/X=#!  
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too aggressive? 9c;lTl^4;  
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Thanks in advance