One clue - it's a very small car. That's it. The colour should be a dead giveaway.

EDIT: If you're just joining us, here's a rundown of where we are so far:

  • Minis, Peel P50s, etc etc etc - way too big
  • Barbie car - too big
  • Hot Wheels - too small

EDIT 2: I'm going to bed soon, and it wouldn't be fair to leave you all hanging, would it? So here's another picture...

EDIT 3: We have a winner!…