Adhesive-Back Magnets 1/2" Thin - Value Pack (10)

Magnets measure approx. 1/2"w x 1/16"d.   Peel and stick on any surface.  Embed them in resin for a permanent hold, and they won't move around as your resin sets up.

Dichro-ISH Heart not included, follow this link to the DIY tutorial if you want to make some.