Divide the kindergartners into groups. Explain that each group will share a cake, and no one is allowed to eat cake until every member of the group has been served. Have the students divide the cake according the size of the group. For example, cut the cake into eight equal slices if there are eight students in the group. Each member of the group would get 1/8 of the cake. After the cakes are divided, discuss the size of each group's pieces, how fractions are part of a whole, and how some fractions are bigger than others. Finally, let the students eat the cake.
Cut at least eight large circles from different colors of construction paper. Leave three circles whole and cut the remaining circles into halves, thirds or quarters. Pass out the whole circles and place the remaining pieces in a bag. Have the students alternate pulling pieces from the bag and placing them on the whole circles. The goal is to complete each circle using the fractional pieces.
Use measuring cups to teach kindergartners simple measurements, such as 1 cup, 1/2 cup, 1/3 cup and 1/4 cup. Demonstrate that four 1/4 cups equal 1 cup, and how 1 cup can be divided into four 1/4 cups. Allow the students to measure different solids and liquids using the measuring cups.
Divide the kindergartners into groups. Distribute an orange or grapefruit to each group. Ask each team to separate the fruit into sections. Have the team remove one of the pieces of fruit and calculate the fraction according to the whole. Demonstrate that a fraction means a part of a whole. Finally, allow the students to eat the fruit.
Watch a video such as "Donald in Mathmagic Land" or a segment of "Sesame Street" involving fractions. Both programs feature images, sounds and characters that will help kindergartners learn fractions.