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. V
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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? nF=Ig-NX^  
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this is the initial list I am working off: _I$]L8hC  
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london FfD2 &(-R  
paris A)`M*(~  
Rome OVj,qL)  
Venice HnY: gu  
Florence ? Z<&: W8n  
Viena j<l>+., U  
Prague X,y$!2QI  
Berlin ? HH+rib'u  
Zurich )$th${pd#v  
Madrid ? /OxF5bN2  
Lisbon ? C{2UPG4x  
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too aggressive? jBE=Ij  
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Thanks in advance