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. Q>Q}/{8!  
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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? i2c<q0u  
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this is the initial list I am working off: ?a_q!,8:  
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london Uv$u\D+@[  
paris (9lx5  
Rome Dy'
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Venice FK('E3PG  
Florence ? Z1}zf(JU  
Viena V'4}9J  
Prague AMiFsgBj  
Berlin ? "+Yn;9  
Zurich qOan
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Madrid ? =C}<0<"iF  
Lisbon ? `^Sq>R!;  
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too aggressive? qf
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Thanks in advance