The term "make it rain" has a few definitions (e.g. "to throw a substantial amount of paper money so that it falls on a crowd, audience, performer, or group of performers, often as a way to show off one's wealth" per Wiktionary), and by and large, those definitions have something to do with money. And if you really want to "make it rain," you may want to use Botswana's currency, the pula. That's because Botswana gets very little rainfall -- so little, that the word for "rain" and "blessing" is the same in Setswana, the language spoken there. That word? "Pula." (taken from a Daily email I get called "Now I Know") Pictures added for your enjoyment. "Pula" also refers to their paper currency.
