We have used a coping and problem solving scale with a sample of children ca. 9.5 years of age (Wills et al., Psych of Addictive Behaviors 2007 et seq).
Eschenbeck H, Und C, Meier S. Media use as a coping strategy for children and adolescents: An addition to the SSKJ 3-8. Zeitschrift Fur Gesundheitspsychologie [serial online]. 2010.;18(4):183-189. Available from: Social Sciences Citation Index, Ipswich, MA.
Self-Report Coping Measure (4th–6th graders)
Causey, D. L., & Dubow, E. F. (1992). Development of a self-report coping measure for elementary school children. Journal Of Clinical Child Psychology, 21(1), 47-59. doi:10.1207/s15374424jccp2101_8