Every day, a man crosses the border on a bicycle with two bags of sand. The border officers get a tip that he is a smuggler. So the customs officers checked his bags carefully, sifting the sand with a fine sieve and found he had only sand. Since they couldn’t find any evidence, they allowed him to cross the border. So, what was the man smuggling?
Drop your guesses in the comments below and I’ll pop back tomorrow with the answer. Good luck!