The changes occurring from the time a child is ten months until twenty months are amazing. During this time, most children progress from crawling to walking and usually end up running everywhere. It's common for emotions to be expressed strongly now, too. Shrieks of joy can mean they're glad to see a parent, a caregiver, or even a puppy. Anger can be demonstrated with howls of rage. Don't be surprised if you or your caregiver notice pushing or biting when frustrated. Some language is used at this stage as well. Your child may proudly assert ownership of many things. 'My' caregiver, 'my' mommy, and 'my' toy are frequently exclaimed as a toddler shows independence. Ten-to twenty-month-old children are sometimes cared for in the same room as infants. As long as there's a room divider, separating 'bed babies' from toddlers, this arrangement is safe. Many states require a 30- to 36-inch wall as a barrier. Most children in this age group are still using high chairs for meals, and continue to take naps in playpens or cribs. By the time a child is 12 to 15 months, you and the caregiver will notice hesitant steps, often aided by bracing on low furniture. From 15 to 20 months, your child's steps will probably become more steady. It's a good idea for caregivers and parents to begin expressing themselves fully now, perhaps saying, 'I'll come back after snack and a nap,' rather than simply assuring the child you'll return. This might help encourage verbal expression, as it meets your child's current need. Many daycare centers will begin toilet training during the end of this phase of development, so speak to your caregiver about working as a team when the time to train begins.