counting toy

ISO 9999 codes:

• 30 03 assistive products for play(58)
• 30 Assistive products for recreation and leisure(59)
• 04 Assistive products for measuring stimulating or training physiological and psychological functions(8)

Source: Lekotek Plan Book of Adaptive Toys Volume 3 - - - Full text at https://archive.org/details/lekotek-v3-fulltext/mode/2up

device tags: toy (54), low tech (32)