Paying for your kids to go to college is one of the biggest reasons to invest in the stock market, especially with the ever-growing cost of college. Parents with kids hopefully heading to college in five, 10, or 15 years want stocks that can deliver steady, reliable growth over a medium- to long-term time frame.Keep reading to see why our Motley Fool contributors think Costco Wholesale (NASDAQ:COST), Tencent (NASDAQOTH:TCEHY), and Walt Disney Co. (NYSE:DIS) could be just the stocks for the job.Image source: Getty Images.Continue reading