Not at all, say experts. Although at around 18 months, toddlers typically go from two naps a day to one, napping is still vital to their health and well-being. In fact, experts recommend that 2-to 3-year-olds get 10 to 12 hours of sleep during the night, with an additional 1 to 2 hours of shut-eye during the day.ot at all, say experts. Although at around 18 months, toddlers typically go from two naps a day to one, napping is still vital to their health and well-being. In fact, experts recommend that 2-to 3-year-olds get 10 to 12 hours of sleep during the night, with an additional 1 to 2 hours of shut-eye during the day.