i got mine with super saver shipping so yes i think its free if you order more than $25 worth of stuff. i grabbed a GH/KH kit.
*just a warning, AMAZON SAYS THIS HAS A GH/KH TEST BUT IT DOES NOT. GH/KH TEST KIT IS SOLD SEPARATELY*
if you buy both i believe the total should come to about 25 ish? or a little less. get yourself a book or something nice