Most are in the original sleeves, but there are several mismatches. Titles include:

 

Learning Basic Skills Through Music - Volumes 1-4
Math Readiness - by Hap Palmer
Mod Marches - by Hap Palmer
Play Your Instruments & Make a Pretty Sound--by Ella Jenkins
You'll Sing a Song and I'll Sing a Song--by Ella Jenkins
We All Live Together - Volume 5
Rock and Roll Fitness Fun
Movin' - By Hap Palmer
Good Morning Exercises for Kids - by Georgiana Stewart
Mainly Mother Goose
The Best of Mother Goose
Peanut Butter Jam (incredibly spreadable)
Silver Burdett Music - Centennial Edition - Volumes 3-8 (Volume 7 has mismatched cover)

Pretend - by Hap Palmer (mismatched cover)

Alpha One - Record 2 (Meeting the Letter Girls & Special Sounds)- Mismatched Cover

Alpha One - Record 3 (Meeting the Vowels) - Mismatched cover

Alpha One - Songs of the Letter People - Mismatched Cover