How can i get my zebra finches to come to my hand?

for my birthday i got 2 (1 male 1 female) zebra finches, ik u can tame them @ any age so if u dont think its possible then just dont answer, but if ur actually a smart person, how can i tame my zebra finch, just so tht he/she will come to me and sit on my finger for a bit?? plz and thank you!