The researcher showed the baby several teddy bears and then raised a screen where the number could be manipulated undetected by the baby. The researcher then showed the baby, for example, another teddy bear and placed it behind the screen, and then lowered the screen. Gaze time, the length of time the baby looked, was significantly greater for incorrect numbers of teddy bears up to three, than for the expected number. Obviously, the babies were not counting. Virtually no one can visualize more than five objects without grouping.
Western music is written with five-line staffs.
When ten lines are needed, as in piano scores, the two groups of fives are separated to make the music readable. Fingers are a natural fives grouping. Teach the child the names for quantities 1-5 by asking the child to raise the appropriate number of fingers with the left hand. Show quantities 6-10 with 5 on the left hand and remainder on the right hand. Do this without any counting, only naming the quantities.