Tongos is a series of educational robot toys meant to support basic literacy created by Cassiano Azevedo during his studies at Faber-Ludens Interaction Design Institute. The toy stimulates children to associate letters and their combinations with sounds. Each robot can read a combination of images and letters:
- Somgo: reads only animal sounds
- Tongo: reads only one vowel at once
- Ditongo: reads two vowels at once
- Tritongo: reads three vowels at once
The toy is activated when children put letters into the puppet’s mouth. Letters have hidden RFID chips, which are read by a built-in reader inside the toy, activating the pre-recorded sound.