Taking 11Mbps [1] as the raw uncompressed incoming data, and assuming 16 hours of waking environment consumption on average (likely high for children), a 13yo has taken in less than 400 TB of information (I used 11 * 60 * 60 * 16 * 365 * 13 / 8.) That's... surprisingly low.

[1] https://www.britannica.com/science/information-theory/Physio...