Over here they are often called 'Intelligence Cubes (or balls)' and Basenjis love to roll them around for treats. They'll chase a frisbie but I have yet to have one bring it back to me. Its more a case of 'come and get it, Mom, and throw it again.' But it does keep us all exercised.
The inner cardboard rolls from toilet paper are very popular, but so are any cardboard boxes they can tear up. Mine have never had any toys as such - they find things and for a while, play with them before losing interest.
Beware of squeaky toys or soft toys with glass eyes. They can eat through to the squeak and the eyes come out and can get eaten. If you wouldn't give a toy to a baby for safety reasons, don't give it to a Basenji.