The required materials and tools:
1. Yarn, I used:

• Gazzal Baby Bamboo (50% acrylic/50% bamboo, 50g (1,76oz)/115m (125yd)) orange (95202), pink (95217) and white (95227) colors
• Gazzal Baby Love (45% acrylic/55% modal, 50g (1,76oz)/115m (125yd)) black (1629) color

1. 2.5 mm crochet hook
2. Scissors
3. Tapestry needle

Abbreviations (US):
Ch - chain
Sc – single crochet

The finished coaster using the materials stated in this pattern is ~3.5 inches / 9 cm in height and ~3.5 inches / 9 cm in width.