They used to show us that cartoon when I was in elementary school. We loved it! Every kid would be singing that song for the rest of the day.
I love Humphrey!! Luckily they put "Humphrey Hop" on the House of Mouse album so I can listen to it all the time!
I did a Humphrey and Woodlore bento lunch the other day...will come back and post a picture once I've got enough posts in.
Quite a few of his cartoons have been uploaded onto YouTube.