Glittery glue dots - for magnets! It looks like those glass filler stones (or maybe dried resin or glue? hmmm), and glitter for the materials - No instructions, but it seems pretty simple going from the pictures.
this chick made this from markers and glue sticks---"The artwork is done with hot glue and a marker! It was very inexpensive, as I used left over house paint, a half price canvas, hot glue for a 3 D effect, and a Marks A Lot marker.
38 Unbelievably Cool Things You Can Make With A Glue Gun