Also know as cup stacking, the individual and team sport involves participants stacking and unstacking 12 specially designed plastic cups into pre-determined sequences.
Benefits include improved hand-eye co-ordination, concentration, dexterity and fitness.
Novice stackers will spend the day practicing with the experienced hands, with tips and tricks passed on freely.
Many of the top competitors will be aiming to beat personal records, as well as those on the national, Asian and world level.
Doors open to the Whanganui Girls' College gymnasium at 8.45am, with a gold coin entry for spectators while students and pre-schoolers are free.