This stitch marker has the shape and the colour of the well known time machine. It takes a few minutes to be made and two (small) scraps of yarn. You can finish it by a ring or a clasp if you want to use it to crochet.
It needs less than 30 meters of the blue yarn and something like 50 cm of the white yarn !
It is a perfect last minute small gift for a geek.
The pattern has only one page, you can download a pdf or an epub files and it exists in English, French ad Spanish.