To make DIY ice cream you will need resealable plastic bags, winter gloves, milk, vanilla extract or cocoa powder, ice cubes, and salt. Put the milk and flavoring in a small ziplock bag. Place ice cubes and salt in a larger ziplock bag and add the small bag inside. Seal the large bag and shake vigorously for 10-20 minutes while wearing winter gloves. Remove the small bag and enjoy your homemade ice cream.