An analogy shows the relationship between two things that are alike in some ways but, for the most part, are different. To illustrate this to children, you might have them list the similarities and differences between cars and boats. The cars and boats are both means of transportation, and they have some of the same parts, like a steering wheel and seats, but they are still different. Kids might also note that cars travel on the road, while boats travel on the water. Then create an analogy based on these observations that kindergartners can understand. The analogy could look like this: a car is to a road like a boat is to ______. In this way, analogies become fun, like a puzzle. Students figure out how the first two things go together, and that will help them figure out the second part.
Because the kindergartners' vocabulary is limited, keep the analogies as simple as possible and limit your examples to items with which the students are familiar. You will also want to talk through the examples at first, giving the students the opportunity to understand what is it they're trying to figure out. For example, present the analogy “pencil is to write as crayon is to ______.” Ask the students how pencil and write are related. If they still don't understand, ask a different question, such as, “What do you do with a pencil?” Once they understand that a pencil is used to write, you can help them reach the conclusion that a crayon is used to color. Carry on this process with several more examples.
When first introducing analogies, especially to young children, it's tempting to stick with familiar types of analogies, such as synonyms (happy:joyful), antonyms (black:white) and part/whole relationships (finger:hand), but it is imperative that you reveal a variety of analogies to exhibit the number of connections items may have with one another. Other popular types of analogies include type (robin:bird), tool/worker (stethoscope:doctor), action/object (ride:bike) and item/location (stove:kitchen). All of these are concepts your kindergartners can comprehend, provided they are give adequate instruction and guidance.
Set up three flashcards (i.e. finger:hand::toe:____) at a time, and allow the students to take turns finding the correct flashcard to complete the analogy. For the sake of time and simplicity, you may want to have three or four flashcards for the students to choose from for each analogy, rather than having them come up with answers on their own. If time permits, allow students to create and draw (or paint) pictures of their own analogies on a piece of paper. Some of the comparisons they produce may surprise you.