From Atlas Etnográfico de Vasconia
[/atlas/juegos/A-tabas-Zeanuri-1993.jpg|Playing knucklebones. Zeanuri (B), 1993. Source: Ander Manterola, Etniker Euskalerria Groups.|Before glass, and even clay, marbles were introduced, they used parts of plants, including oak acorns and seed pits.|]
