Children's Science Curiosity Scale (CSCS)
The Children's Science Curiosity Scale (CSCS) measures elementary school children's attitudes towards science in a learning context. Originally used with 5th grade students, it is comprised of 30 items, each using a 5-point Likert scale. Validity and reliability studies have been done on this scale.
The pearweb.org link provides a description of this scale, reviews of this scale, and the instrument itself.
Authors provide instrument validity and/or reliability information.