KONG Active toys promote healthy exercise and fulfill cats’ instinKONG Active toys promote healthy exercise and fulfill cats’ instinctual desires to chase, hunt and capture. The new KONG Cork Ball is made with all-natural cork and entices play with added catnip and feathers.ctual desires to chase, hunt and capture. The new KONG Cork Ball is made with all-natural cork and entices play with added catnip and feathers.