The purpose of this exploratory single-case study is to investigate the affordances of iPad transpired within a technological pedagogical and content knowledge (TPACK) framework by four early childhood educators with varying Technological Knowledge (TK) at a low-income preschool. Pre/post and follow-up survey, group and follow-up interviews, classroom observations and document of iPad workshop data were analyzed using coding methods in two cycles. The exploration in how teachers discovered the iPad affordances indicated parallel progression in TK and change in their value system. The exploration in the progression of TK and change in their value system suggest a relationship between progression of TK towards TPACK and of affective-valuing (AV) towards affective-characterization (AC).