4-5 years old 5-6 years old 7-9 years old Attentive Back to camera Back view Bending Boys Candid Caucasians Childhood Children Children only Clear Companion Companionship Contemplate Curiosity Curious Eight years old Five years old Four years old Friendly Friends Friendship Girls Helping Horizontal Hunched over Kids Kindergarten Leaning Looking Looking down Nine years old Outdoors Outside Pensive People Person Picking flowers Playmates Preschoolers School age Serious Seven years old Six years old Spring Squatting Stock photo Thinking Touching Trees Under 5 Woods