Here are three formal rephrasings suitable for a 13-year-old:
- Perforated pages manufactured from thick board, each containing numerous small holes that permit tactile contact or insertion.
- Thick-board pages featuring an array of fine perforations designed to allow attachment, alignment, or passage through the holes.
- Sheets of heavy card stock punctured with many small apertures to enable physical contact, ventilation, or mechanical connection.
Note: If you mean a specific type of "contact" (for example, touching through the holes, attaching something, or routing a connector), tell me which and I will tailor the wording exactly.