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).
You might want to check out this video of Wilbur reading a number of opposite poems.