• Wet socks
• Splash particle effect
• Sound effects
• Biome-colored puddles

Hey, if you want to add wet socks, I think a compatibility with Glumbis (https://www.curseforge.com/minecraft/mc-mods/glumbis) would work! They already have socks and wet socks in the game, so all you would really need to do is make them compatible with your puddles!