Introduce bees by reading toddlers a few age-appropriate books that talk about bees. Ideas include "Are You a Bee?" by Judy Allen, "The Honeybee and the Robber" by Eric Carle and "The Very Greedy Bee" by Steve Smallman and Jack Tickle. If the toddlers are having a hard time sitting still, take a few breaks during the book to have them all stand up and say "buzz" while they flap their arms like a bee's wings.
The letter "B" and the word "bee" sound just the same, so take advantage of this fact to work on letter recognition with toddlers. Before the lesson, cut out a block letter "B" from white paper. Draw a vertical line down the center of the "B" to divide it into the body on the left and the curved wings on the right. Color the left side of the letter with horizontal yellow and black stripes. Leave the wings on the right side white. Draw a face in the top-left corner of the "B" and draw antennae coming off the top. For the lesson, fly the letter B into the room and show the toddlers that it looks like both a bee and a letter. Have them take turns tracing the letter with a finger.
Make snack time for toddlers a chance to continue the lesson on bees. Pour a couple of different types of honey into white bowls and show kids the different shades of yellow that honey can be. Let them dip pretzel sticks into honey to taste the different types. In addition, serve honeycomb-shaped cereal pieces and talk about the shape of the honeycomb in a beehive.
Use an empty cardboard toilet-paper roll as the base for a simple bee craft for toddlers. The first day, help each child paint a toilet-paper roll yellow. After those have dried, give each child two strips of black paper to glue around the toilet-paper roll like a bee's stripes. Glue two googly eyes to the yellow head and glue on two white ovals of paper for wings.