Mannapro poultry grit- okay for younger chicks

[BluetheRaptorChicken]

I just got a bag of MannaPro Poultry grit for my chicks ranging from 2-4weeks old and on the back it says only 8+ weeks should be fed this grit and I should get chick grit for younger. I am starting to train them I mean awesome snacks and want to make sure they get the grit because of the snacks. Do you think this grit should be okay? Their my first ever chickens and I don't wanna mess them up. Thanks in advance for your help!

 

[BluetheRaptorChicken]

Never mind they're too big. I found washed play sand. Thank goodness for a landscaping place near me!