The curtains are drawn, lights are dimmed and the books are ready to go back on the book shelf in exchange for a night of happy dreams. Instead, your little ones are full of stories of their own. You just know the road to dreamland is at least another hour away. Falling asleep is difficult for many toddlers and pre-school children. Research shows approximately 21 percent of pre-schoolers deal with at least two sleep challenges, including nightmares, difficulty falling asleep, repeated night waking or daytime tiredness.