Help id Cobweb spider/Black widow juveniles

A friend gave me recently these 3 spiders. I wonder if they are cobweb spiders or black widow juveniles. I looked online pictures of them both but can't really tell, being of the same family it's kind of hard to tell. I already asked a few people but they couldn't tell me for sure... So here are some pictures:










I noticed 2 of them stay on the bottom of their cage + the third one on top, close to the lid, webbing and created a little "packet" with tiny yellow dots inside, I looked at it really closely but can't tell what it is really. Here are some other shots even more recent:







On the 2 following pictures you can see the tiny yellow dots. Not very well, behind the spider but the best I could do.







I would really be grateful to know what they are!

From the photos, I can not tell. The bottom two pics looks similar to an immature black widow. Do you know the origin of the spiders?

That is what I was thinking... They came from a spot where this friend used to find mature black widows, that's why we have a good chance to think they're immature widows too, so in dark, rather humid places... But since I was asking to several people and they said they weren't sure, I had a doubt. It would be the first time I see immature secimens in person!

That one we think is an immature BW ate a tiny mealworm yesterday night... Been very active. Will publish other pics soon!

Really dont think those are widows.
Juvi widows are still black
They have a red pattern that reminds
Me of arrows
If you want some let me know...