Wilbur's first book based on this game, OPPOSITES, was published in 1973. The poems in both volumes are a bit nutty, thoroughly entertaining, and downright clever. Here's one from MORE OPPOSITES."Richard Wilbur, his wife, and their four children used to play a rather unusual game around the dinner table. One member of the family would suggest a word, and then everyone would join in a lively quarrel about its proper opposite."
The opposite of kite, I'd say,
Is yo-yo. On a breezy day
You take your kite and let it rise
Upon its string into the skies,
And then you pull it down with ease
(Unless it crashes in the trees).
A yo-yo, though, drops down, and then
You quickly bring it up again
By pulling deftly on the string
(If you can work the blasted thing).
Here's a nice video of Wilbur reading a number of opposite poems.