Adult slouch hat pattern made in puff stitch with front post double crochet and crab stitch edging. Pre-teen size also available on blog. Intermediate pattern can easily be changed to suit a beginner, instructions included in pattern.
Any worsted weight yarn. I prefer Caron's One Pounder for this hat. 5.0mm hook and tapestry needle.
adult size but pattern also available for pre-teen
pattern can be found here