| A | B |
| reversibility | Flatten play dough then reshape it |
| 8 month physical characteristics | Bounces on feet when held, pull up and stand |
| Six-year-olds | Concentrates for long periods, wants to be right and to win |
| attention span | Approaches to learning and Cognitive development |
| 5 year-olds cognitive characteristics | understand use of computer;following 3 commands in order |
| reflex | grasping a caregiver's finger |
| 9 to 10-year-olds language characteristics | vocabulary of 5,400 words; conversing well with adults |
| 5-year-old emotional characteristics | not wanting to be treated like a baby; being moody |
| 36-months-old Social characteristics | Plays with an imaginary friend |
| 4 year old emotional characteristic | manages anger well; does not like to be treated like a baby |
| 2-year-old language characteristic | Makes short sentences |
| 3-year-old emotional characteristic | less frustration because they can do more things |
| 2-year-old emotional characteristics | frustration at things they cannot do |
| multiple classification | sorting objects by shape and color |
| 9 months old | understands object permanence |
| seriation | organizing objects according to size |
| imitate | learn by watching others |
| imaginary | toddlers may have make-believe friends |