Show more circles when hovering

Hello,

I have one row with circles. Is it possible, thats when I hover the circles thats showing more cicles under the row? How like a dropdownmenu.

But not among themselves but a second row under the circles?

not so
. . . . .
.
.
.

but so (that is the result after a hover one circle)

. . . . .
. . . . .

thanks in advance

http://besolima.hol.es/wordpress/