Make games for a round screen played with the ring around it: an M5Stack Dial, a LiPo cell and a 3D-printed case that holds both, with games such as a pinball table that falls into a vortex, and several players over the Dials' own Wi-Fi, with no server.

Drape conductive stretch fabric over an upturned bowl ringed with resistive and piezoresistive strips, and sense where the hands press, how hard, and how they strike and sweep.

Hang a ball from a ceiling-mounted Gametrak: its weight balances the tether's pull, and its swing plays the sound.

A round, upright harp of Gametrak tethers bound by a movable ring, for groups of players from young children to skilled musicians.