Prepare in advance 5 yellow and 9 blue cubes
Make 2 groups of yellow and blue cubes. One group should consist of 5 yellow cubes. Another group should consist of 9 blue cubes. The cubes in the groups should be scattered in a random order, not put in a straight line or row. The two groups should be located away from each other to make them distinctive groups but not too far from each other so that the baby can see two groups in one location. Smile and say: Baby, which group do you thing is larger and which one is smaller? Let’s make predictions! I think group 1 (place your hand above it) is larger. Now we can check it out. We will put each group in a tower. Start putting yellow cubes in one tower, counting: 1, 2, 3, 4, and 5. Say: There are 5 (show 5 fingers) cubes in this group. Now we will build another tower with blue next to the yellow one. Start putting the blue cubes, counting: 1, 2, 3, 4, 5, 6, 7, 8 and 9. Say: There are 9 (show 9 fingers) cubes in this group. Place your hand over the first group. Say: here are 5 cubes. Place your hand over the second group. Say: and here are 9 cubes. The yellow tower is shorter than the blue one. The blue tower is higher than the red one. That means that the blue cubes are more than the yellow ones.
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