It depends on the paper. On thin paper, test on a back page first and use a light touch.
How do I keep highlighters from drying out?
Cap them right after use and store them flat.
How do I know which age a product is for?
Every product page and package lists a recommended age. As a general guide, many of our crayons, markers and paint sticks start at 3+, most craft kits start at 6+, and fountain pens are 12+.
