I love these things because my Father used to make dollshouses & furniture & fittings for them out of bits of everyday things - I recall him painstakingly cutting brick shapes from the sides of matchboxes for the external brickwork. So much patience!
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.