| A | B |
| Socialization | Learning to get along with other people. |
| Imaginary | Existing only in the mind, not in reality. |
| Solitary play | Playing alone. |
| Parallel play | Playing near, but not actually with other children. |
| Cooperative play | Playing with another child including interaction and cooperation. |
| Imitative-imaginative play | Fantasy or dramatic play which imitates real life. |
| Moral development | Learning to base one's behavior on beliefs about what is right and wrong. |
| Einstein | "Understanding physics is child's play compared to understanding child's play." |
| Thomas J. Watson, Sr. | "If you aren't playing well, the game isn't much fun....I tell myself to go our an play as I did when I was a kid." |
| Heraclitus | "Man is most nearly himself when he/she achieves the seriousness of a child at play." |
| Piaget | "Play is children's work." |
| Plato | "You can discover more about a person in an hour of play than in an year of conversation." |