Is the 24 hour security guards always at front desk monitoring who can come in the building? Are kids allowed to roam around without always having adult supervision?

No it’s staff from around 7am till 6pm and than security guard takes over for the non work hours when employees go home and even than they aren’t at the desk whole time they do their rounds in building and garage ...And I see kids roaming around all the time. They even sit in front of my door with their friend that lives across from me just hanging out. Why they choose the hallway to hang out when they have the roof or patio is beyond me. As long as they aren’t too noisy and bay bay kids than it’s all good.

Yes and no. I've only seen the kids run on the 1st floor, never mine.