"On average, children spent 10 days in solitary confinement, but children have been held for up to 29 days in isolation. Children held at Kishon described being locked in a small, windowless cell lit 24 hours a day by a dim bulb. There they slept on a concrete bed, on the floor, or on a thin mattress they often described as "dirty" and "foul smelling." Cell walls are grey "with sharp or rough protrusions that are painful to lean against." ""