In designing communication technology for children, it is important to understand the affective benefits and costs introduced by a particular medium. We present an Affective Benefits and Costs of Communication Technologies Questionnaire appropriate for use with native Englishspeaking children aged 8-10. We discuss the iterative design and testing of the survey instrument and provide the current survey items. Categories and Subject Descriptors H5.m. Information interfaces and presentation (e.g., HCI): Miscellaneous. General Terms Human Factors Keywords Children, communication technologies, survey design