Modelling

Brain

Create Sphere → scale up a bit → make editable
Select Sculpt mode:
Draw → in Setting → Strength: 100%
Flatten → Size: 100
Use top, side and front view to sculpt the sphere to a brain shape (hold L click mouse)

To further modify the brain shape:
Sculpt → Draw → Basic → tick Link Size and Link Strength; Setting → Size: 18

Want to print your doc?
This is not the way.
Try clicking the ⋯ next to your doc name or using a keyboard shortcut (
CtrlP
) instead.