Use this link to check out one of the three bundle options!
Learn Blender with the help of the creators at GameDev.tv! This comprehensive bundle features everything you need to get started or level up your skills with the free, open-source 3D art software. Learn about animation, rigging, modeling, environmental art, and more with GameDev.tv’s courses. Pick up Alpha Brush Packs and materials to help carve out details in your creations. Get a complete kit for your Blender learning journey, and help support One Tree Planted with your purchase!
You can always check out the most recent Humble Bundle offers here and here.