diff --git a/mythical-creatures/README.md b/mythical-creatures/README.md
index d4d0ec65..04b60ec5 100644
--- a/mythical-creatures/README.md
+++ b/mythical-creatures/README.md
@@ -11,7 +11,7 @@ In order to complete these exercises create a class for each of the mythical cre
 Navigate to the `mythical-creatures` directory in your terminal, and then run your first test:
 
 ```
-ruby test/unicorn_spec.rb
+ruby spec/unicorn_spec.rb
 ```
 
 If you get an error regarding a certain gem not being installed, you may need to run the following command from your terminal:
diff --git a/objects-and-methods/exercise-1/spec/bag_spec.rb b/objects-and-methods/exercise-1/spec/bag_spec.rb
index 4e20cd51..b8201f46 100644
--- a/objects-and-methods/exercise-1/spec/bag_spec.rb
+++ b/objects-and-methods/exercise-1/spec/bag_spec.rb
@@ -4,48 +4,54 @@
 
 RSpec.describe Bag do
   it 'is empty' do
-    expect(Bag.new.empty?).to be true
+    bag = Bag.new
+
+    expect(bag.empty?).to be true
   end
 
   xit 'can count the candy in an empty bag' do
+    bag = Bag.new
+
     expect(Bag.new.count).to eq(0)
   end
 
   xit 'has no candies when it is empty' do
+    bag = Bag.new
+
     expect(Bag.new.candies).to eq([])
   end
 
   xit 'can put a candy in a bag' do
     bag = Bag.new
-
     candy = Candy.new('Sour frogs')
-
-    bag << candy
+    bag.add_candy candy
 
     expect(bag.candies).to eq([candy])
   end
 
   xit 'is not empty when it has candies' do
     bag = Bag.new
-    bag << Candy.new("Nerds")
+    bag.add_candy Candy.new("Nerds")
 
     expect(bag.empty?).to be false
   end
 
   xit 'can count candies' do
     bag = Bag.new
-    bag << Candy.new("Caramelized Almonds")
+    bag.add_candy Candy.new("Caramelized Almonds")
 
     expect(bag.count).to eq(1)
   end
 
+  # NOTE:
+  # You usually don't want to chain a bunch of
+  # different methods together like this:
+  #   type = bag.candies.first.type
+  # We'll talk about it more in a few weeks.
+  # However. it's important to understand how these methods work.
   xit 'contains candies and candies have a type' do
     bag = Bag.new
-    bag << Candy.new("Hershey's Kisses")
-    # You usually don't want to chain a bunch of different
-    # types of things together like this.
-    # We'll talk about it more in a few weeks.
-    # It's important to understand how these methods work, though.
+    bag.add_candy Candy.new("Hershey's Kisses")
     type = bag.candies.first.type
 
     expect(type).to eq("Hershey's Kisses")
@@ -53,9 +59,9 @@
 
   xit 'can be asked if it has a particular kind of candy' do
     bag = Bag.new
-    bag << Candy.new("Lindt chocolate")
+    bag.add_candy Candy.new("Lindt chocolate")
 
     expect(bag.contains?('Lindt chocolate')).to be true
-    expect(bag.contains?('Nerds')).to false
+    expect(bag.contains?('Nerds')).to be false
   end
 end
diff --git a/objects-and-methods/exercise-1/spec/trick_or_treater_spec.rb b/objects-and-methods/exercise-1/spec/trick_or_treater_spec.rb
index 31b319a8..cf243141 100644
--- a/objects-and-methods/exercise-1/spec/trick_or_treater_spec.rb
+++ b/objects-and-methods/exercise-1/spec/trick_or_treater_spec.rb
@@ -31,7 +31,7 @@
 
   xit 'can get candies' do
     trick_or_treater = TrickOrTreater.new(Costume.new('Spaceship Mechanic'))
-    trick_or_treater.bag << Candy.new('Gummy bears')
+    trick_or_treater.bag.add_candy Candy.new('Gummy bears')
 
     expect(trick_or_treater.has_candy?).to be true
   end
@@ -41,16 +41,16 @@
 
     expect(trick_or_treater.candy_count).to eq(0)
 
-    trick_or_treater.bag << Candy.new('Gummy bears')
+    trick_or_treater.bag.add_candy Candy.new('Gummy bears')
 
     expect(trick_or_treater.candy_count).to eq(1)
   end
 
   xit 'can eat candies' do
     trick_or_treater = TrickOrTreater.new(Costume.new("Baron"))
-    trick_or_treater.bag << Candy.new("Gummy worms")
-    trick_or_treater.bag << Candy.new("Liquorice")
-    trick_or_treater.bag << Candy.new("Salty Serpents")
+    trick_or_treater.bag.add_candy Candy.new("Gummy worms")
+    trick_or_treater.bag.add_candy Candy.new("Liquorice")
+    trick_or_treater.bag.add_candy Candy.new("Salty Serpents")
 
     expect(trick_or_treater.candy_count).to eq(3)
     trick_or_treater.eat
diff --git a/objects-and-methods/exercise-2/spec/bag_spec.rb b/objects-and-methods/exercise-2/spec/bag_spec.rb
index 3733387e..535b297e 100644
--- a/objects-and-methods/exercise-2/spec/bag_spec.rb
+++ b/objects-and-methods/exercise-2/spec/bag_spec.rb
@@ -4,59 +4,65 @@
 
 RSpec.describe Bag do
   it 'is empty' do
-    expect(Bag.new.empty?).to be true
+    bag = Bag.new
+
+    expect(bag.empty?).to be true
   end
 
   xit 'can count the candy in an empty bag' do
+    bag = Bag.new
+
     expect(Bag.new.count).to eq(0)
   end
 
   xit 'has no candies when it is empty' do
+    bag = Bag.new
+
     expect(Bag.new.candies).to eq([])
   end
 
   xit 'can put a candy in a bag' do
     bag = Bag.new
-
     candy = Candy.new('Sour frogs')
-
-    bag << candy
+    bag.add_candy candy
 
     expect(bag.candies).to eq([candy])
   end
 
   xit 'is not empty when it has candies' do
     bag = Bag.new
-    bag << Candy.new('Nerds')
+    bag.add_candy Candy.new("Nerds")
 
     expect(bag.empty?).to be false
   end
 
   xit 'can count candies' do
     bag = Bag.new
-    bag << Candy.new('Caramelized Almonds')
+    bag.add_candy Candy.new("Caramelized Almonds")
 
     expect(bag.count).to eq(1)
   end
 
+  # NOTE:
+  # You usually don't want to chain a bunch of
+  # different methods together like this:
+  #   type = bag.candies.first.type
+  # We'll talk about it more in a few weeks.
+  # However. it's important to understand how these methods work.
   xit 'contains candies and candies have a type' do
     bag = Bag.new
-    bag << Candy.new('Hersheys Kisses')
-    # You usually don't want to chain a bunch of different
-    # types of things together like this.
-    # We'll talk about it more in a few weeks.
-    # It's important to understand how these methods work, though.
+    bag.add_candy Candy.new("Hershey's Kisses")
     type = bag.candies.first.type
 
-    expect(type).to eq('Hersheys Kisses')
+    expect(type).to eq("Hershey's Kisses")
   end
 
   xit 'can be asked if it has a particular kind of candy' do
     bag = Bag.new
-    bag << Candy.new('Lindt chocolate')
+    bag.add_candy Candy.new("Lindt chocolate")
 
     expect(bag.contains?('Lindt chocolate')).to be true
-    expect(bag.contains?('Nerds')).to false
+    expect(bag.contains?('Nerds')).to be false
   end
 
   xit 'can get a particular type of candy' do
@@ -104,7 +110,3 @@
     expect(candy.type).to eq('Lifesavers')
   end
 end
-
-
-
-
diff --git a/objects-and-methods/exercise-2/spec/trick_or_treater_spec.rb b/objects-and-methods/exercise-2/spec/trick_or_treater_spec.rb
index 2fa35907..123a514a 100644
--- a/objects-and-methods/exercise-2/spec/trick_or_treater_spec.rb
+++ b/objects-and-methods/exercise-2/spec/trick_or_treater_spec.rb
@@ -31,7 +31,7 @@
 
   xit 'can get candies' do
     trick_or_treater = TrickOrTreater.new(Costume.new('Spaceship Mechanic'))
-    trick_or_treater.bag << Candy.new('Gummy bears')
+    trick_or_treater.bag.add_candy Candy.new('Gummy bears')
 
     expect(trick_or_treater.has_candy?).to be true
   end
@@ -41,16 +41,16 @@
 
     expect(trick_or_treater.candy_count).to eq(0)
 
-    trick_or_treater.bag << Candy.new('Gummy bears')
+    trick_or_treater.bag.add_candy Candy.new('Gummy bears')
 
     expect(trick_or_treater.candy_count).to eq(1)
   end
 
   xit 'can eat candies' do
     trick_or_treater = TrickOrTreater.new(Costume.new('Baron'))
-    trick_or_treater.bag << Candy.new('Gummy worms')
-    trick_or_treater.bag << Candy.new('Liquorice')
-    trick_or_treater.bag << Candy.new('Salty Serpents')
+    trick_or_treater.bag.add_candy Candy.new('Gummy worms')
+    trick_or_treater.bag.add_candy Candy.new('Liquorice')
+    trick_or_treater.bag.add_candy Candy.new('Salty Serpents')
 
     expect(trick_or_treater.candy_count).to eq(3)
     trick_or_treater.eat
@@ -73,9 +73,9 @@
   xit 'increases the sugar level when it eats candies' do
     trick_or_treater = TrickOrTreater.new(Costume.new('Hobbit'))
 
-    trick_or_treater.bag << Candy.new('Gummy worms', 88)
-    trick_or_treater.bag << Candy.new('Liquorice', 83)
-    trick_or_treater.bag << Candy.new('Salty Serpents', 71)
+    trick_or_treater.bag.add_candy Candy.new('Gummy worms', 88)
+    trick_or_treater.bag.add_candy Candy.new('Liquorice', 83)
+    trick_or_treater.bag.add_candy Candy.new('Salty Serpents', 71)
 
     trick_or_treater.eat
     trick_or_treater.eat