Sorry if I'm mistaken but if I remember correctly from your last forum topic, all these mares have now arrived at your place bringing their foals with them? If this is so then for the moment I would simply turn them out together in as large an area/paddock as you can - suppliment with piles of hay spread round the area if grass is lacking - and just give them time to settle in and get used to you.
If the mares are friendly and happy to have you 'do things' to them, then concentrate on them, ignore the babies. The babies will soon get used to having you around/near by and will take comfort from the fact that their dams are not worried by you. Go and sit down in the paddock and wait for the babies to come and 'investigate' you, gently reach out and offer neck scratches when the oportunity arises.
If you have stalls available, then once the mares are relaxed, move a couple of them at a time into the stalls (always more that one if possible so they have company) and just 'fiddle/groom' the mare, finishing off with a 'crouch' down on the floor to give the foal a chance to come over and say hello. Before very long you will find the foals wanting to come and see you and as they gain in confidence they will become more relaxed with you and you can progress from short spells of scratches to fiddling with manes and then tails etc to remove the burrs. There is no rush, just enjoy being with them, and in no time at all you will have you little ones clammering for your attention!
I am a complete opposite of any normal person where foals are concerned LOL!! None of our foals are weaned until they are 6 months old and none see a headcollar until AFTER weaning! All our foals are wormed and have their feet trimmed while out in the fields with their dams - just using scratches and friendliness to keep them still. Once weaned they are already used to us 'fiddling' with them and also to following us about for the fun of it, plus more scratches, so popping headcollars on simply becomes part of just another game and they are happy to play! Headcollars are put on and off while they are all together in a large barn, then perhaps a rope is attached to one while we walk it round the barn - they follow automatically as they have always done. They are only called into the barn for a short spell each day for their food - youngstock pellets, we have loads of grass! - and when they are ready to leave one is headcollared and 'lead' out again, following us and its companions, after a short way, the headcollar is removed and the weanling free to join its friends.
It only takes us about 5 days to have them all leading happily and we then move on to leading them further and away from their friends, they then learn to stop and start on request and get the real feel of control on the end of a rope. No problems and all handling is done in a quiet and relaxed way. I would never grab and grapple with a nervous foal just to get a headcollar on it (unless it was for medical reasons) I'm all for time, time and more time until a relaxed foal is happy and confident! Two months after weaning, daughter was having to clip two of our weanings for their first small local show......their reaction? "Clipping??? Oh it is just another of the games we play - no problem" LOL!!
Told you the we are quite mad here - but it works for us.
Sorry for the long post - I do tend to ramble on!