Many phones these days, however, don't have the "stubby" antenna anymore, opting for an internal device to grab the cell phone signal.
Penmanship, if taught at all, is best taught using fat crayons or short and stubby pencils, as it forces their little fingers to hold the pencil correctly rather than grabbing it with their whole fist.
At the same time, you may find that mobile phones with "stubby" antennas get better receptions that phones with internal antennas.
In achondroplasia, the long bones fail to develop normally, making the arms and legs disproportionately short and stubby (and sometimes curved).
In addition, small muscles tire more easily than large ones, and the short, stubby fingers of preschoolers make delicate or complicated tasks more difficult.