Making a homemade paintball can be dangerous and is not recommended. Paintballs are pressurized containers that can cause serious injury if they burst or break. Additionally, using homemade paintballs in paintball guns can cause damage to the gun and potentially harm the user or others. If you want to participate in paintball, it is much safer and more enjoyable to purchase commercially-made paintballs and use them in proper paintball guns designed for their use.