Allow rabbits to be equipped to 4R or 4L.
Effect : A bunny follows you around (sticks to within 3 tiles of you and teleports to your feet if forced outside this range, it has no hitbox) giving you +1 explore and -1 int (for the attention they require), feeding it a carrot by selecting a carrot then right clicking the rabbit in your equip bar with it gives you a further +1 explore for 5 mins, stacks up to +2 explore for 5 mins. Yes, you can have 2 bunnies at the same time (hence the stacking).
Another short and simple one.