The Crafty Kids Guide to DIY Electronics: 20 Fun Projects for Makers, Crafters, and Everyone in Between

The minimum and maximum age in years for which a product is intended or suitable. It can be expressed as a single number, a numeric range (e.g., "6-8"), or an open-ended value such as "9+" indicating the lower bound only.

The total count of individual pages contained in a book or printed publication. It represents the number of physical sheets that make up the product, regardless of layout or formatting.