Numerosity

The Baker Films were created by Jim Henson during the first season of Sesame Street. Ten of them were produced, for the numbers 1-10 (one of the few series of counting segments to feature a segment about the number one).

These films opened with an animated sequence where kids counted up to 10 and then back to one (this sequence was remade for various The Number of The Day segments for numbers 1-100 during the 36th season). After that, an animated sequence of kids counting up to a certain number as animated numbers zoomed to the screen was shown.

After the segments number was announced, various people announced that number of items. Then, a baker announced that segments number of desserts, and then he fell down a flight of stairs. Jim Henson was the voice of this baker, but somebody else played the baker.

These segments were featured regularly untill the mid-to-late 1980s, possibly because the baker falling down the stairs could be seen as a bad example for kids.

Here is a guide for these segments:

"Let's Sing a Song of One" One bird! One belly! One wedding cake! (Notes: This appears to be the most rarely seen of the baker films. This is also one of the few baker films to feature a muppet, in this case, Little Bird)

"Let's Sing a Song of Two" (Note: This segment was featured in the first episode)

"Let's Sing a Song of Three" Three balls! Three peas! Three little piggies! Three crocodiles! Three birthday cakes! (Notes: Jim Henson makes an on-screen cameo as a juggler. Brian Henson makes an on-screen cameo as the kid who says "three peas". This segment was shown in the first episode, and was actually shown before the two segment, making it the first baker film shown on TV)

"Let's Sing a Song of Four"

"Let's Sing a Song of Five" Five Horns! Five dogs! Five cocanuts! (Notes: This song was included in the albums Sesame Street Book and Record, where it's called "Number Five", and Songs From The Street, where it's called "Five Song". Both recordings don't include the baker falling down the stairs)

"Let's Sing a Song of Six" Six Squares! Six strawberry shortcakes!

"Let's Sing a Song of Seven"

"Let's Sing a Song of Eight"

"Let's Sing a Song of Nine" (Note: Rowlf makes a rare Sesame Street cameo in this sketch)

"Let's Sing a Song of Ten" Ten toes! Ten triangles! Ten bowling pins! Ten indians! Ten toys! Ten chocolate-layerd cakes! (Note: a few years after the broadcast of this skit, to be more politically correct, the "ten indians" were replaced with "ten bells". This sketch was reviewed by Oscar The Grouch and Telly Monster (and imitated by Ernie) in a Sneak Peek Previews sketch)