Throwing

Throwing stones and shapes. 
More from the Chimps are Family sculpture trail at More London with a dance rehearsal in the background. 
Another one.

"Female, Age 8.
Wild Chimp Throwing

Chimps throw things for many reasons. Males throw rocks and even spears as a display of dominance. But some chimps like to throw rocks at trees, often the same tree. This may be a ritual or perhaps some trees make a nicer 'thunk'."