Probably very complex. Closest I've seen was Sony's Qrio https://robotsguide.com/robots/qrio https://robotsguide.com/robots/qrio though that was over 20 years a

Probably very complex. Closest I've seen was Sony's Qrio https://robotsguide.com/robots/qrio https://robotsguide.com/robots/qrio though that was over 20 years ago so maybe some advances have been made in further miniaturization since then.