To make a young child sleep, use the routine things with the assurance that when he/she wakes up, Mom and Dad will be home for him/her. In case of a toddler, you will be required to have a calming routine; usually, a soft song, or lullaby, or just holding on the chest and patting the bottom rhythmically can serve the purpose. It helps calm the child, relax, and make her feel secure. Sleep follows soon after.