They are way too young to even guess. Trust me! Maybe try when they're about 8 weeks old. But even then it's just guessing unless there are obvious cockerels. Good luck! They're very cute
This ones hard but Im going to guess pullet. She seems to hold herself like one, and I know the non bearded silkies can have sizable combs and wattles. But Im really not certain. Id say behavior is your main giveaway right now.
Id say Mari is definitely a pullet and am leaning that way on Gandolf too but need more close ups of Gandolf. Specifically a good profile shot and comb shot. :)