These round bird papercraft characters are mascots for the official site of Tsubame, a city in Niigata, Japan.
These bird papercrafts are used to promote the National Sports Festival in that city. The mascot's design is based on the Japanese Ibis (aka crested ibis) - a white bodied, long-legged wading bird with a long down-curved bill and a red face. It represents the city of Tsubame's kokutai (national identity / national character).
Four models to choose from, the first couple is a boy and girl basic model. The second pair is sport themed, archery for the girls and karate for the boys. Check them out.