Letter Factory is great.  That said, I realised that my son could not recognise lower-case letters using this DVD.    I therefore supplemented it with Meet The Letters from Preschool Prep.  The advantage of this DVD is that it also teaches lower-case letters, as well as the different versions of lowercase 'a'. 

http://www.amazon.com/Meet-Letters-animation/dp/B000BD68AM/

Thanks, this is very useful info!

Hi, if you're based in Singapore, I have the following to swap:
 
Leapfrog DVD: Meet the Letters, Talking Words Factory 1 & 2, Storybook Factory, Numbers Circus
Scholastic Treasury of 100 Storybook Classics DVD box set
Preschool Prep DVD Box set: Meet the Letters, Numbers, Shapes, Colors, Sight Words 1-3
Early Start Mandarin Chinese with Bao Bei (full set volumes 1-6)
Mathtutor: Young Minds - Numbers & Counting
Rock N' Learn - Telling Time
The First Wave: Fundamentals - Think
Wink to Learn Chinese box set
Play and Learn Chinese with Mei Mei Vol. 1
40+ episodes of WordWorld & 40+ episodes of Blue's Clues


I am looking for the following (all full sets where applicable):
Tweedlewink
Baby Learns Chinese (Levels 1-6)
Play and Learn Chinese with Mei Mei (apart from Vol. 1)
Trebellina
Soft Way To Mozart
Themes To Remember
Sing to Learn Chinese
YBCR
Little Pim
Kid 20/20

Pls PM me directly if you have interest to swap.  Thanks!