The photos offer a unique, insider's insight into life in Mathare, and capture nuances and details that might be missed by an outsider. In this photo, a woman's stall remains open to sell vegetables into the night.
Many of the photos taken by the children reflect the harsh environment they are forced to live in. Hygiene is poor and raw sewage is often present in the streets
Here, a young girl does her laundry by the side of the road.
Other photos show a side of life which is seen far less by the outside world. Here, a street preacher delivers an address while wearing clothing made from sacks.
Omwanda notes that his students, though children, demonstrate a keen eye in their photographs. This image, taken by Gladdy Moraa, is called 'children must be given time to play.'
Omwanda also notes there is a lot of positivity in Mathare, and a lot of passion and commitment, as is evident in this image of children playing soccer.
"It doesn't matter whether we have playing shoes or not. What matters is the passion and skills," he says.
This photograph of two siblings clutching each other in an embrace shows that love endures in the slums, despite the other evident hardships.