Teacher should print out and cut given card into 20 parts. After that, he/she explains that children should match cars with garages choosing appropriate colors.  E.g.  Red garage is for the red car.

Each child should have one garage and one car. After matching them according to their colors, teacher gives to each kid A4 papers and children should glue garages and cars in one paper. After gluing up all the cars and garages, it`s turn to sound them: I have a green car and a green garage. Teacher may multiply the numbers of colors, cars and garages according to the number of children.