Hello Flossie , A have a simple solution to your problem , your Modem has WIFI. Therefore you can go ahead and purchase a WIFI dongle for your PC in te grandkids room , I recommend purchasing this http://www.amazon.com/Bolse%C2%AE-300Mbps-Wireless-N-Mi... This will make the pc in your Gran-kids room be able to connect to the Internet wireless-ly