^^ Sheldon lists a number of reasons, but the inherent flex of the cheap ones (and they were all cheap) means that in emergency stops the lever has to be pulled up to, or even past the top of the bar to adequately slow you down. If you keep the brakes finely adjusted, ie, touchy, they will do the job, but just barely.
Better to either use regular drop levers and show the kids how to use them, or go with an upright style.
^^ Sheldon lists a number of reasons, but the inherent flex of the cheap ones (and they were all cheap) means that in emergency stops the lever has to be pulled up to, or even past the top of the bar to adequately slow you down. If you keep the brakes finely adjusted, ie, touchy, they will do the job, but just barely.
Better to either use regular drop levers and show the kids how to use them, or go with an upright style.