what can fly???

while bowie was in the bath tub she was differentiating what things can fly and what cannot.  and not only if they could fly or not, but as to why...

mommy: can a kangaroo fly?
bowie: no they hop
mommy: can a squirrel fly?
bowie: no they chase up a tree
mommy: does a car fly?
bowie: no it drives
mommy: can a train fly?
bowie: no it has wheels
mommy: does a shark fly?
bowie: no it goes under water
mommy: tell me something else that flies
bowie: a rocket ship 

this little blows my mind sometimes!