I've heard these described many different ways.
Jack Hartmann has a song that describes them as "tall, small & fall."
I just put clip art to the animals and listed the letters that go with them.
This is good for the kids, but also good to give to the parents as well.
Great to talk about at Open House. Younger kids, our Special Needs kids & struggling learners need visual discrimination tips & tricks to learn the lower case letters. So many of the letters look alike. Anything you can give them to differentiate between those letters helps.