I used to use them when my children were young (oldest is 32 and happily still not diabetic). It might be worth choosing ones that check for ketones as well as glucose though to be honest glucose is the most important thing because you can get ketones for non sinister reasons.
I suspect your main issue will be that there are generally 100 strips in a jar and the strips will be out of date before you use all of them.. (I used to use them when my kids were sick or unusually thirsty.. And speaking as a T1 who got an early diagnosis because of vigilance by her T1 mother, albeit pre pee sticks, it's not a bad idea, as long as you don't get too paranoid about it and over test...)