This is a pattern for a small car, which looks like an egg with a trailer. You will also find on my blog the pattern for the eggs and the driver which is the Miniami-Baby.
a crochet hook
every wool you wish
some plastic material or cardboard
If you use Catania wool from Schachenmayr the eggmobile has a length of 2,95 inches and the trailer 1,6 inches
You can find the pattern here: amilovesgurumi.com