Child Child, Preschool Humans 2 child 2 human preschool child 2 psychology Bolivia 1 Cross-Cultural Comparison 1 Cross-cultural analysis 1 Culture 1 Development 1 Discovery 1 Exploration 1 Exploratory Behavior 1 Female 1 Global Health 1 Health Promotion 1 International Cooperation 1 Learning 1 Male 1 Oral Health 1 Oral health prevention and education 1 Peer Group 1 Peer Influence 1 Play 1 Play and Playthings 1 School Health Services 1 Social development 1 Societies, Dental 1