Talkie-Tapes are 24 inch long (610mm) by 0.08 inches wide (2mm) by 0.020 inches thick (0.5mm) red plastic strip audio recordings. Similar to the groove on a record, but straightened out. Talkie Tapes are played by sliding your thumbnail down the recorded side. They need to be attached to something light that can easily vibrate, (for example the surface of a toy balloon) to amplify the sound and give it a voice.