(Note: not my pic, found it on french ebay)
C - ???
D - Dé (Dice)
E - Elephant
L - Livre (Book)
M - Maison (House)
N - Noix (Nut)
It looks to be "cerise/cerises" (cherry/cherries) though i dont know what that red-liver shaped object is above it.
Fun fact: the Portuguese version of Alphabet Classroom (called Escola Interativa) is based off the french version, meaning that this unknown object also has a Portuguese word for it
What do you think?