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. 2a.NWJS  
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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? 4 E3@O  
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this is the initial list I am working off: QOuy(GY  
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london ~m!>e])P?X  
paris N-^\X3X  
Rome j-gLX  
Venice g|<)J-`Q  
Florence ? +Smv<^bW  
Viena C koPno  
Prague 3FUZTX]Q1  
Berlin ? 7tAWP Swf  
Zurich f<SSg*A;  
Madrid ? {%D "0*^  
Lisbon ? {N5g52MN  
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too aggressive? Z.6`O1OY}?  
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Thanks in advance