"March is a time of traditions," said Jim Cramer on his "RealMoney" radio show Monday, referring to the "March Madness" men's college basketball tournament and its many investment opportunities. This year the tradition will be huge, with a Gallup poll showing that 41% of America's workers are college-ball fans and that the games will be broadcast online for free for the first time, Cramer said. About $3.5 billion to $4 billion was wagered on March Madness games last year, and this year online betting is expected to reach far more people, he added. Cramer said that big-screen TVs are his first play on the tournament, telling listeners to look into Matsushita Electric Industrial ( MC), whose brands include Panasonic, Technics and JVC. He called it the most undervalued company in the hardware game, with the stock selling at $21 a share. As for what's inside your television, he said Trident Microsystems ( TRID) makes the brains of the TV. But, he warned, the stock is up a buck. If it pulls back, then Cramer would think about buying Trident. He also likes Corning ( GLW) because the company makes the glass for big-screen TVs. The stock has pulled back 8% from its high, he said, and he believes that it's going higher. Plus, the company also makes the fiber that will be used to replace the existing copper-based trunk-line system so that phone companies can pipe TV-quality video into homes, he said. And Cramer believes that this cycle will kick in for the stock later this year. Where you buy the TV provides another play, and that means Best Buy ( BBY), he said. "This stock confounded Wall Street last September when it blew up ... and missed estimates," Cramer said. "That was your chance. That was the big sale."