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.
DIY Nail Polish Crafts -Watercolor Glasses - Easy and Cheap Craft Ideas for Girls, Teens, Tweens and Adults Fun and Cool DIY Projects You Can Make With Fingernail Polish - Do It Yourself Wire Flowers, Glue Gun Craft Projects and Jewelry Made From nailpo
Presse papier marbré au vernis à ongle - Marbled Paperweight DIY. These pretty rainbow rocks are perfect for brightening up your desk! With just some nail polish and water, you can transform an ordinary rock into your own marbled paperweight.