We made these little pins for our friends out of 2mm EVA and Worbla.
2mm EVA settings
Engraving - 1000/12/340
Cut - 350/20/3x
Edit - Oops, completely forgot, if using EVA, heat seal the foam first! Before putting it thru the Glowforge, use a heat gun and pre shrink it. Low settkng until it’s a tad shinny on both sides.