toddler - n. a young child who is just learning to walk

naughty - adj. behaving badly — used especially to describe a child who does not behave properly or obey a parent, teacher, etc.

litter - n. a group of young animals that are born at a single time

personality - n. the set of emotional qualities, ways of behaving, etc., that makes a person different from other people

laid-back - adj. relaxed and calm

particularly - adv. more than usually

pace - v. to walk back and forth across the same space again and again especially because you are nervous

agility - n. ability to move quickly and easily

registry - n. a place where official records are kept

characteristic - n. typical of a person, thing, or group