This is a fantastic digital library to recommend to you from the University of Nebraska called the Government Comics Collection. This archive contains full PDF versions of educational comics commissioned by federal agencies. There are 183 in total that you can download to read.
You can see Captain America go to war against drugs and see Spiderman put Venom on trial. There are a wide variety of subjects and themes featuring plenty of well known characters. Charlie Brown tackles eyesight problems, Superman and Wonder-Woman spread the word about land mines.
Some of the most entertaining comics are those from the 1950s with a strong safety message. Have a browse and find hours of entertainment! Don’t forget Bert the Turtle reminds you to duck and cover!