Suba drummer beats out a Rhythm on a traditional skin drum (Engoma) made of a Lizard Skin, while the child plays Ibu (calabash) filled with seeds or small stones to mix/blend the music. A combination conveys much more meaning with regard to the sort of messages transmitted to meet the requirements of each occasion.
The child is acquiring musical knowledge from the older man. However, the younger generation appear unconcerned to acquiring these skills, while the aged who can make and use the instruments are also passing away without transmitting their valuable skills.
Source: The Beautiful people of Kenya by Mohamed Amin, Duncan Willets & Brian Tetley