Like Castro's plan to genetically engineer a socialist "super cow" that would provide so much milk it would solve Cuba's milk rationing problems overnight.
Or his plan to grow giant pineapples, bigger, juicier and sweeter than plain old capitalist pineapples.
Or his ill-fated 10 million tonne sugar harvest of 1969-70 that was to make Cubans extremely wealthy but ultimately only served to destroy what little was left of the island's once-thriving economy.
Now, another of Castro's loopy schemes from that era has come to light - in one of his own newspapers.
A column in Juventud Rebelde reveals that Castro was seriously worried about the nutritional intake of the North Vietnamese in the 1960s, at the height of the war against the US-backed South Vietnamese.
Ever the practical dictator, he came up with an ingenious solution.
He ordered his diplomats to carry an unknown number of live toads from Havana to Hanoi, where the animals would be supposedly farmed and then distributed to the populace. A case of 'Food problem? What food problem?'
Of course, these were not ordinary toads but ranas toro, a type of native North American toad that is very high in protein.
Back in those days, the trip from Havana to Hanoi would involve at least 24 hours of flying, with Cuban planes having to make as many as four stops along the way.
The paper confirms that one of the diplomats was so concerned (or scared) about the fate of these valuable toads, he was forced to keep them in the bath of his Moscow hotel overnight and then fish them out one by one, before flying on to Hanoi.
Unfortunately, the paper does not reveal what happened to the toads in the end, or whether they arrived safely. Nor does it reveal how the North Vietnamese reacted to Castro's lunatic scheme.
H/T to our friends at Penultimos Dias.