Write it all down in a letter. Hand write it and present it in a frame or whatever. Or find a song which you think does all of that for you and burn it onto a CD and give it to them.
You can complete & print personalised 'gift of time' certificates online completed with something you would like to give or do for the person. e.g Cook a favourite meal, do a chore, I just googled gift certificate and some came up.