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. 6R,Y.srR  
58XZ]Mc0  
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?  Q
Eg[  
D(l,Z  
this is the initial list I am working off: v^ "qr?3V  
eZEk$W%  
london A|GtF3:G  
paris ,`JYFh M  
Rome r1}^\C  
Venice b"uO BB  
Florence ? Q7rBc wm5  
Viena <pfl>Uf  
Prague \_WR:?l  
Berlin ? u$yXuFj/  
Zurich h;,1BpbM  
Madrid ? jYi,oE  
Lisbon ? ^R=`<jx   
fGb}V'x}r  
too aggressive? vhPlH0  
8T1zL.u>q  
Thanks in advance