The flowers are very simple to crochet, you can experiment with different yarn types and crochet hooks. To make these flowers I used vibrant colored yarns and a size "f" hook.
To crochet the flowers make a 4 chain and join it together in the first stitch with a single stitch to make a ring.
Single chain six stitches in the ring.
To make the first petal single stitch in the first stitch, chain three, double crochet, chain three, and single stitch again in that same stitch. Your first petal is complete.
Repeat to make a total of six petals. Then fasten off.