Stop playing games and parent.
Maybe send them through text? 
You sound like my husbands ex
Sounds like y’all need to grow up.
Print out the pics and throw ‘em in an envelope with a stamp and there ya have it. Send to his mother or someone else if you don’t want contact with him and ask that they be passed along.
Is there a middle man you could send them to? If the best thing is for you two not have contact I would not Try to engage
I think it would be sending mixed messages to block then unblock then block again. Text him the photos
You said it’s best to have each other blocked. So print them and mail them. Smh.
If he wanted to see them yall wouldn’t of blocked each other 
. Like I don’t send my oldest sons father pictures if you aren’t even conversing not even waste your time his loss
You can’t reblock on FB for 24 hours…
Download the wizard app to talk about parenting things
I would get his phone number and text it to him I don’t know y’all situation but for me I would never do that regardless if I was really mad at my ex my ex recently blocked me as well so I’m kind of on the x standpoint on this I guess he has my son most times I get visits Summers breaks ext but we have figured out how to co-parent after 13 years you know and grew up but recently he did block me but I have his phone number I still text and like hey how is he doing or send pictures for my child to see like his siblings ext but now my son has his own phone so I just call my son directly at this point idk honestly but you need to unblock him and get to speaking terms for that child’s sake it ain’t about y’all at this point it’s so immature to be like that regardless of situation y’all’s actions are inappropriate
This sounds like a train wreck. Does the father have an opportunity to see his girls? If so let him take his own pics. If not, send the pics through a neutral 3rd party, if there is one.