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Ecdysozoans
Smiling
A facial expression typically signifying happiness, friendliness, or amusement, involving the upward curving of the lips.
Initiative-versus-guilt
A stage in Erik Erikson's theory of psychosocial development, typically occurring from age 3 to 5, where children begin to assert power and control through directing play and other social interactions.
Preschoolers
Young children typically aged between 3 to 5 years, who are in the developmental stage prior to attending kindergarten.
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