I wouldn't. That's too early.
I'm all for high frequency training but going too frequently with kids this young can cause a problem in the future. Once the body gets used to it, you have no room to increase frequency.
I would have them stick to their program, maybe do ONE weekly squat session since they aren't doing any real squatting.
If there is one movement I would do daily it's the power clean since it's a higher skill lift.