vilBay, which, unusually, features Black Widow and Hawkeye as well as the usual Cap, Hulk, Thor and Ironman. I had to be a bit creative with the cutting to get it out of a metre but it worked out in the end.
Note: If you are thinking of making this pattern it seems to come up a little big.
When are you too old to play with Lego? I can't answer that but I haven't got there yet. Anyway with some colourful lego bricks, jewellery findings and my handy-dandy Dremel you can make some funky earrings. This pair, and several similar ones in different colours, are now available in Eloise's Folksy shop