Notes:
Pattern in US terms
Beginner level
Round count will be in [] at the end of each row
Repeat stitches in ** for x time
Materials:
3.5 hook
Brain Colored yarn
Stitch marker
Scissors
Stuffing
Stitches and abbreviations:
MC- Magic circle
Sc- Single Crochet
Inc- Increase
Dec- Decrease
FO- Finish off
Brain
1. Mc 8 [8]
2. *Inc* x8 [16]
3. *Sc, Inc* x8 [24]
4. *Sc 2, Inc* x8 [32]
5-8. Sc around [32]
9. Sc 6, Dec x 8, sc 6 [20]
10. Sc 2, Dec 8, sc 2 [12]
11-12. Sc around [12]
Stuff
13. Decx6 [6]
Fo sew closed
Surface HDC for wrinkles
I recommend drawing lines where you want the wrinkles with a disappearing ink marker. And starting in the middle front and working each hemisphere individually. 
