What time do you think is a good time to go to bed for young ones?
www.babycenter.com states

How much sleep do they need?
Kindergartners need about 10 to 12 1/2 hours of sleep per night (with naps declining and eventually disappearing around age 5), and older elementary age kids need 9 1/2 to 11 1/2 hours a night.

Here are some ideas for you little one(s) to get some good nights sleep by the babycenter.com

Sleeping little ones with the right amount of sleep each night can lean to good growth and development
To help your child get plenty of zzz's:
Establish a consistent bedtime. School-age children should be in bed by 8 to 9 p.m. (earlier for the youngest grades and kids who need a lot of sleep).
Set up a good bedtime routine, which helps signal to your child's body that it's time to wind down. This might include giving him a bath or a snack, reading a bedtime story, and talking or singing to him softly while tucking him in.
Make sure your child's room is conducive to sleep. It should be dark and quiet.
Don't keep a TV and computer in your child's room.
Avoid stimulating activity before bedtime.
Stick to the same timetable and routines for bedtime on weekends and vacations that you follow during the week. A variation once in a while won't cause long-term disruptions, but erratic bedtimes can lead to poor sleep habits and sleep deprivation.