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.
Repairing Wood: Strong Glue Joints in Wood. Repair broken furniture and cracked woodwork, make stronger woodworking projects, and learn how to make cleaner, tougher glue joints with these gluing tips and techniques.
Picture Frame as Key Holder Framed hooks will keep keys organized& looking decorative. Eliminate the glass and paint the backing or cover it with fabric or paper. Then attach the key hooks using an extra-strong glue.