Thanks for the help. I have a separate WLAN for them but it doesn't prevent it from changing AP. As far as I know, I can't create a WLAN that picks and chooses with AP is part of that group. If I can, then that makes life much easier.
For the MAC address of the AP, I did see that each WLAN gets a separate MAC so I did use the MAC for that specific AP. What I am trying to make work is for the computer to associate only with 1 AP specifically and not any of the 3 that it sees.
Since I am using the web interface for the ZD, let me know if this is right.
Under Monitor/Currently Managed APs, the AP I want is this.
c4:01:7c:0e:f3:30 RuckusKidsDesk2 Above Kids Desk 2 outside main office zf7363 Connected (Root AP)
For the WLAN
BSSID Check-in/CBCKids c4:01:7c:4e:f3:39 802.11g/n Up
If I use the BSSID as the mandatory AP, won't that still allow the computer to switch AP?