I've been configuring VLANs on our network, and have run into a bit of a problem. So far I have a 3com 3950 which is a layer 3 switch, and 3com 4226 which i believe is only layer 2. Main network ...
As for the VLANs, just get a wifi router that provides a guest network or second SSID with client device isolation and have the kids and IoT devices use that. Or a firewall that can do more than one ...