I checked the NGA website for collection information tonight:
Alexander Calder (artist)
American, 1898 - 1976
Crinkly Worm, 1971
sheet metal
overall (height): 46 cm (18 1/8 in.)
Collection of Mrs. Paul Mellon, in Honor of the 50th Anniversary of the National Gallery of Art
© 2000 Estate of Alexander Calder / Artists Rights Society (ARS), New York
1991.7.10
On View

Kindergarteners these days are way more sophisticated than in our paste-eating days.
