Pan Card for below 5 years is called Child PAN Card. Child PAN Card do not have Applicant's Photo on it. It has parent's/guardian's signature on it.
It has PAN number printed on top and contains PAN holder's name, date of birth, father's name. Most important, it also has Hologram which makes it genuine ID proof for its holder. This is why Child PAN Card is asked to by banks or other financial institutions as proof of Identity of Child - below 18 year individual.