Kiduchu proves that girls can play football just as well as boys. But when the ball lands in Mzee Kigo’s yard, she has to use her math skills to add positive and negative numbers if she wants to get the ball back. Kiduchu anaonyesha kuwa wasichana wanaweza kucheza mpira wa miguu kama wanavyoweza kucheza wavulana. Lakini wakati mpira ulipodondokea nyumbani kwa Mzee Kigo, ikabidi Kiduchu afanye hesabu za hasi na chanya ili aweze kupata mpira Ubongo Kids Books help children to learn and love mathematics and science through entertaining stories and fun activities. Vitabu vya Ubongo Kids vinawasaidia watoto kujifunza na kupenda hisabati na sayansi kwa kupitia hadithi zinazofurahisha na mazoezi ya ufahamu.