All you need is a couple of bananas (ripe), a sharp knife and a dehydrator.
Cut the bananas into thin slices and place on a dehydrator rack.
Place in the dehydrator for 24 hours (at 115 degrees Fahrenheit) until the Banana chips are crunchy. Store in an airtight bag or jar. Munch as required.
I reckon a few of these will end up in the kids lunches.
Note how these have not gone brown – no additives – no preservatives – just bananas!