I wish I had children like that.
https://www.amazon.com/SaltStick-Ele...ords=saltstick
https://www.amazon.com/SaltStick-D01...tick+dispenser
It wouldn't hurt to get some electrolytes down too. I like Saltstick pills, and for shooting you'll also need to buy the salt stick dispenser. The lead on your fingers will never become an essential nutrient, so the dispenser will let you pop pills without touching them. The magnesium and calcium components of most electrolytes pills is basically chalk and it'll stick to inside of your water bottle if you try to dissolve them (and why most powdered products don't have either).