With barbies and Legos, little cars are my third obsession. The metallic material is quite noble to work on jewels and you can play with the different colours.
The little car necklace has a lot of success especially with boys who are really emotional about it and pick on the jewel the one which was their favourite as a kid. It's always a way to engage conversation and create social links.
Here, an article about my own vision of style on Be superior