CONCORD, N.H. – For the aspiring cooks and crafters who frequent Pinterest.com, “pinning” something is one thing. “Nailing” it is another.

By letting users create “virtual pinboards,” Pinterest has become a popular way to keep track of home decor ideas, recipes and craft projects spread across the Internet. But those who go beyond collecting pretty pictures and actually attempt to recreate the crafts often discover it’s harder than it looks.

Such failures are featured to humorous effect on at least two sites, including Pintester.com and CraftFail.com. As the name implies, the former chronicle’s one woman’s dogged attempts to replicate recipes, fashion, beauty products and craft ideas she spots on Pinterest. The latter, which was launched before Pinterest existed, accepts submissions from anyone who has tried, and failed, at crafting of any kind.