A square or hexagonal pipe that is turned in order to rotate the rotary table of a drilling rig.
A roly-poly (toy).
Tumblers, tilters and kellys are those toys which have a circular base with a weighted end. They sway to and fro and are not knocked completely over. They derive from the East and have various names, but most represent stability in some form or another. 1971, Gwen White, Antique Toys And Their Background, page 169:
Heart's Desire—20 inch silk chiffon square—navy and shocking, grey and turquoise, brown and kelly, or green and violet, on white ground. $ 4.00 Matching contour belt […] 1953, Harold Wallace Ross, William Shawn, Tina Brown, David Remnick, Katharine Sergeant Angell White, Rea Irvin, Roger Angell, The New Yorker, page 58:
Today there is no color or fabric that is out for girl or teen chubbies. Plaids, big, bold block designs, dark or light grounds, heavy textured wools, fleeces and brilliant colors of red, kelly or green, odd or off shades of rust, lavender, and other colors in the fashion cycle are now adapted in designing. Designers themselves have learned that the chubby is more truly eager for a fashionable dress[…] 1947, Girls' and Teens' Merchandiser: The National Trade Magazine for the Girls' and Teens' Industrypage=31: