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NEW YORK ( TheStreet) -- "There are some things I've been keeping from you," Jim Cramer's never told "Mad Money" viewers Tuesday. So he went a little autobiographical to tell viewers how he came to make the markets his life and where he learned his most valuable lessons about money and investing. Cramer said that unlike most people who became interested in the stock market, his love of stocks didn't start in college or even in high school. He said it was fourth grade when he first noticed how his father's mood would change based on whether his stocks were going up or down that day. That piqued his interest, he said. That started an investment education from Dad that has stuck with him ever since. Cramer recalled how his father brought home the 1964 board game "Stocks & Bonds," manufactured by, of all companies, 3M ( MMM), which drew him into the markets even further. It turned out stocks are a lot like his obsession with baseball since you're always on the lookout for which players are hot and which ones are not. What's the lesson from Cramer's elementary school days? Get your kids involved with money early in life and they may just play for life, which is a good thing since the stock market is a long-term game.