Get this fun Flowers ebook containing seven flower patterns!
To make the flowers you need to know how to chain, slip stitch, single crochet, double crochet and half double crochet (US terms). A few flowers are made using magic ring and there's a link to a clear tutorial on how to do this. You'll also find an explanation on how to work cluster stitch and double cluster stitch since they're used in some of the patterns.
The samples were worked in Phildar Phil Coton 4. A substitute yarn in a selection of shades is shown below.