At the Lighthouse Grace Academy in Nairobi's downmarket Kwangware suburb, yellow school t-shirts carry the slogan 'To Fear God is Wisdom', but in their hands pupils clutch a more worldly path to knowledge: tablet computers. The hand-sized tablets are part of the 'Kio Kit', a digital classroom in a suitcase designed by local technology company BRCK, which two years ago launched the hard-wearing, brick-sized modem that works as a wifi hotspot.