Grover's Music Maker was originally called Monkey Music and featured a dancing monkey instead of Grover.
Grover's Music Maker was an attempt by Atari to introduce children to the music through some well known (and some not so well known) children's tunes. Selecting one of the twenty letters (A -T), will cause Grover to start jumping around while some music is played in the background. The game was shown at the Winter 1983 Winter CES. A 1983 Atari Kid's Library press kit states this was to be available July 1983. It's unknown why the game got canned, but it may be due to Atari pulling the plug on the 2600 Children's series after its less than stellar performance. Other reasons may have been poor beta testing results or limited long term playability.
A) Old McDonald Had a Farm
B) Twinkle, Twinkle, Little Star
C) Here We Go Round the Mulberry Bush
D) Over the River and Through the Woods
E) Hush Little Baby
F) The Itsy Bitsy Spider
G) My Hat Has Three Corners
H) Skip To My Lou
I) Three Blind Mice
J) Hickory Dickory Dock
K) Do You Know the Muffin Man?
L) A-Tisket, A-Tasket
M) Go Tell Aunt Rhodie
N) Sur le pont d'Avignon (Over the bridge of Avignon)
O) I'm a Little Teapot
P) Go In and Out the Window
Q) This Old Man
R) Unknown
S) Unknown
T) Bobby Shafto