Amigurumi ball (US terms). Worsted yarn, 3.5 mm hook, fiberfill, stitch marker. Work in a spiral; move the marker up each round. About 7 cm across.
Round 1: 6 sc in magic ring. (6)
Round 2: inc in each st around. (12)
Round 3: (sc, inc) x6. (18)
Round 4: (2 sc, inc) x6. (24)
Round 5: (3 sc, inc) x6. (30)
Rounds 6-10: sc in each st around. (30)
Round 11: (3 sc, dec) x6. (24)
Round 12: (2 sc, dec) x6. (18)
Stuff the ball firmly.
Round 13: (sc, dec) x6. (12)
Round 14: dec x6. (6)
Fasten off, close the hole with the yarn tail and weave in.