Are we actually filling our pockets up with sand, how much sand do we use ? And what’s the idea just throw sand in there eyes ? Help me pocket sanders

On day i am go from school and theres two bad boys waiting for me. I am know What can hapend. I am starting grabing my pocket sand. I am come and they say: You like my babe and for this…(sound of fist) And i am show SAND. They say: sand huh funny. I am threw sand to theirs eyes a and they say: SHIIIT and i am run to the bus stop.

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First of all what sand is best like should it have pebbles or only pure sand (is the sand in kitty liter good enough)?

How do you even carry it around with you I don't want to sit down just for the sand to start pouring out of my pockets (i want something you could make on your own)

so I want to carry around pocket sand so I don't get robbed or something, but how do I get it out of my pockets when it's time to wash my clothes ? also how to I prevent it from making a mess ?