OakSapling [v1.5.1] [25w06a+].zip is a release file of the Minecraft resource pack Oak Sapling (First textures of Minecraft), made for Minecraft 1.21.5, 1.21.5-Snapshot. It was published on April 8, 2025 and is 4 MB in size. For the full description, screenshots and every other version, visit the Oak Sapling (First textures of Minecraft) resource pack page.
How to install: Put the .zip into .minecraft/resourcepacks (do not extract it) and enable it under Options → Resource Packs.