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. t.( `$  
Rt#QW*h\|i  
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? E;a,].  
M/W"M9u  
this is the initial list I am working off: CP7Fe{P  
" aG6u
^%  
london m!xv
WqY+  
paris }B-$}  
Rome cr!8Tp;2A  
Venice "-&K!Vfs  
Florence ? QD@O!}; T  
Viena u}% OC43  
Prague Vgj#-7bdyi  
Berlin ? MH.+pqIv^  
Zurich ,8 4|qI  
Madrid ? V}s/knd
 
Lisbon ? j-K[]$  
"u6pl);G  
too aggressive? :BPgDLL,  
H,%bKl#  
Thanks in advance