An extension of the learning "Show, Tell, Record!" is to have your son freeze in a position and then take a picture with a phone or tablet device. Send that to your son and ask him to write a description. This can then be shared with friends, relatives, or even teachers.
Here are a few apps that help
Educreations app on the iPad:
ScreenChomp app:
Also you could just take the picture on your phone, upload it to computer and have your son either write on a printed out copy or type the text out underneath the image in a WORD document