A fun and educational Serotonin Molecule amigurumi crochet pattern for chemistry, biology and craft lovers alike!

• Beginner level pattern

Stitches required:
MR = Magic ring
Sc = Single crochet
Hdc = Half double crochet
Inc = Increase
Dec = Invisible decrease
Rnd = Round
Ch = Chain
3inc = (3 sc in next sc)
HdcInc = 2 hdc in next stitch
FO = Finish off

Materials required:
DK yarn (other yarn is also fine, however this will affect the size) in Yellow and Black
3.5mm crochet hook (or size appropriate to yarn used)
Stuffing (I use polyester filling)
Tapestry needle
Pins