Funny MS-Painted textures will make Minecraft graphics look like cartoony. According to the author, this texture pack was created in the Paint application using only 20 colors from the standard palette.
How to install MS-Painted texture pack
Make sure you have Optifine installed and working correctly.
Download the texture pack and leave it archived.
Launch Minecraft, go to Settings.
In the ‘Resource Packs’ section, select ‘Open resource pack folder ’.
The ‘resourcepacks’ folder will open, copy the archive there.
After copying, the texture pack will appear in the section of available packages. Click on it to move to the Selected Resource Packs section.
Start a new game or load an old one. Textures will appear in all saves.