A little wooden box that carries big voices
Your child presses one button and Grandma hears their voice on her phone. She holds a button and her reply lights up the box on the shelf. No screens for the kids, no apps to learn for the grandparents.

Flash it in your browser
Plug the DIY kit into USB and the setup wizard flashes the firmware and connects it to your WiFi — no tools, no terminal.
Invite the grandparents
Send a link. They tap it, see their grandchild's face, and press play. That's the whole app.
You stay in control
Quiet hours, revocable access, and every contact approved by you. Voice notes are private to your family.