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. jez=q  
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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? 6BK-(>c(6  
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this is the initial list I am working off: __N< B5E  
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london 3
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paris *YH5kX  
Rome shlMJa?  
Venice >tc#Ofgzd  
Florence ? >dO1)  
Viena dC+WII`V  
Prague
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Berlin ? r Q)?Bhf  
Zurich U4;r.#qw,  
Madrid ? Z./$}tVUG  
Lisbon ? nk=+6r6  
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too aggressive? E;m]RtvH  
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Thanks in advance