Polymer clays or plasticine clays are made of synthetic plastics and require âcuringâ or low heat to harden. They stay moldable for a very long time if stored properly in a plastic or metal box (no paper or fabric that would absorb the moisture). Polymer clays are usually very smooth and have a silky feeling.
On average, 4th graders are 9-10 years old because that is the normal age for the grade. But kids could potentially be anywhere from about 8 to 11 years old, since some kids hâ¦ave to repeat a year in school and get behind, and then some kids are a year ahead or have late birthdays before the cut-off date.
By fourth grade, academics have kicked into high gear and subjects become more sophisticated. Fourth graders are more responsible and beginning to think critically. Hereâs what your fourth grader is already learning in the classroom along with the skills he or she should acquire by the end of this school year. Reading. At this point in the year, your fourth grader should be reading longer chapter books and more nonfiction books and texts.