This cute hat is made in 8 ply Bendigo Cotton, Sizes 6 to 12 months and 12 months + so will fit the older child. Gauge is not a problem as this pattern is worked to measurements, this means that any ply yarn can be used to achieve the size you require. English crochet terminology has been used with U.S. equivalents provided. Video Tutorials on the various crochet stitches can be accessed from the pattern prior to printing it from the ravelry site, all you need is to follow the prompts on the page.