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. 4[
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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? 1jOKcm'#  
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this is the initial list I am working off: y*KC*/'"  
BHiOQ0Fs  
london h3t$>vs2F"  
paris ;tN4
HiN  
Rome 8m7eaZ  
Venice eYDgEM  
Florence ? z+6QZQk  
Viena Hd*Fc=>"Y  
Prague 5byeWH0n3  
Berlin ? |B|@GF?:  
Zurich yam}x*O\xn  
Madrid ? BA`:miH<  
Lisbon ? {jG.=}/Dk  
/d]~ly @uI  
too aggressive? 3jg'1^c  
y1Z1= U*!  
Thanks in advance