One unusual stool design is the abstract Dancing Circles chair, which has a base made from several interlocking rings in angled positions. VivaTerra, an ecofriendly design company, created the Jigsaw Puzzle stool collection, which features seating surfaces shaped like puzzle pieces that fit together to form a table or bench.
The ultra-modern furniture company qed* designed the Headstand chair, a stool shaped like an upside down chess pawn. The stool balances on its head, enabling it to rotate on its axis and rock back and forth without tipping over. Another contemporary design is the Koncord stool sold by Italian company Slide, which is available in several bright colors. Designed by Karim Rashid, the Koncord stool contains a slender base that leans backward at the top and has a curved edge at the bottom. The base also has a triangular cutout, and the thin seat protrudes from the slanted base, creating the appearance of weightless suspension.
The Japanese design team of Koji Yano and Yoshiyuki Kashiwagi created a chair shaped like a silhouetted figure lying on its back with both feet up. The stool is designed to mimic the concept of an adult playfully lifting a child up with his feet. Designer Anna Ter Har created a collection of stools that appear to have one melting leg. The stools have a traditional round top and tripod base, but one leg is molded from multicolored layers of resin, producing the look of a gooey, melting liquid.