For this unicorn I used:

Caron cakes in ‘Rainbow Sprinkles’
3mm crochet hook.
A smaller hook for the horn and maybe a lighter weight yarn
Some good quality toy stuffing.
12mm black safety eyes
A needle for joining pieces

You’ll need to know:
how to do an adjustable loop - tutorial included
single crochet (US terms)
invisible decrease - tutorial included

You can of course use any yarn and the smallest hook that works with it.

Orlando is worked from the bottom up and has a cute spiralling horn. The horn does look best if worked with a smaller hook.