I just bought my son a dokiWatch S.:
It runs Android 4.4 and their launcher Doki something.
I will be honest, the UI and responsiveness is CRAP, but it's to track my son with special needs, and it can do regular phone calls (their VOIP app is also CRAP). The specs show the device runs 4GB storage and 512MB ram. If we could get away to install Google DUO or Messenger Kids, this would be a VERY CAPABLE little device for video call, messaging, Google Trusted Contacts and Google Map (the device has it own GPS).
Any ideas ?