Unbreakable felt tip pens?

[drspouse]

DS just bashes felt tips on the point and the point goes into the pen... no more felt tip pen.
We mainly use coloured pencils (the only damage there is dropping them on the floor, and though the unbreakable ones are NOT unbreakable, they aren't too bad - and you can buy replacements for DS' ergosoft ones so that's OK).
But DD I think would like to use felt tips if they didn't get destroyed.
They are 4 and 6 by the way so not fancy adult ones, and both of them struggle a bit with pencil grip so we've got them triangular ones in the past.

Several years or running craft activities with children and we've tried all sorts of pens. For me Crayola seem to hold up well for the price. The round ended "my first" ones almost indestructible but not as precise as others.

The chunky ones in a pack of 8 are pretty durable too. Only downside is the lack of colours.

The finer ones have a much bigger range of colours but are that bit more squash able. That said I've been using the same ones with my group for a couple of years and that are at least cheep enough to replace.