She's heard of intermediate-aged children who organise Mathletics parties, and children who play it in preference to other games.
"Kids are achieving from day one, and enjoying it. We get parents come up and just about hug us," she said.
Mathletics is already being used by some Wanganui schools and some individuals, and Ms Blanch is hoping they will make themselves known at her TechEx stall.
"We get a kick out of feedback from parents, teachers and kids. We know we make teachers' lives easier."
Her business, 3P Learning, is based in Whakatane and also makes spelling and reading aids.