diff --git a/src/spectator.cr b/src/spectator.cr
index c9ee602..b1e2b2f 100644
--- a/src/spectator.cr
+++ b/src/spectator.cr
@@ -5,10 +5,8 @@ module Spectator
   VERSION = "0.1.0"
 
   macro describe(what, source_file = __FILE__, source_line = __LINE__, &block)
-    module Spectator
-      module Examples
-        DSL::StructureDSL.describe({{what}}) {{block}}
-      end
+    module SpectatorExamples
+      ::Spectator::DSL::StructureDSL.describe({{what}}) {{block}}
     end
   end
 
diff --git a/src/spectator/dsl/builder.cr b/src/spectator/dsl/builder.cr
new file mode 100644
index 0000000..dd69fbb
--- /dev/null
+++ b/src/spectator/dsl/builder.cr
@@ -0,0 +1,59 @@
+module Spectator
+  module DSL
+    module Builder
+      extend self
+
+      @group_stack = [ExampleGroupBuilder.new]
+
+      private def current_group
+        @group_stack.last
+      end
+
+      private def push_group(group : ExampleGroupBuilder)
+        current_group.add_child(group)
+        @group_stack.push(group)
+      end
+
+      def start_group(what : String) : Nil
+        push_group(ExampleGroupBuilder.new(what))
+      end
+
+      def start_given_group(what : String, values : Array(ValueWrapper)) : Nil
+        push_group(GivenExampleGroupBuilder.new(what, values))
+      end
+
+      def end_group : Nil
+        @group_stack.pop
+      end
+
+      def add_example(factory : ExampleFactory) : Nil
+        current_group.add_child(factory)
+      end
+
+      def add_before_all_hook(&block : ->) : Nil
+        current_group.add_before_all_hook(block)
+      end
+
+      def add_before_each_hook(&block : ->) : Nil
+        current_group.add_before_each_hook(block)
+      end
+
+      def add_after_all_hook(&block : ->) : Nil
+        current_group.add_after_all_hook(block)
+      end
+
+      def add_after_each_hook(&block : ->) : Nil
+        current_group.add_after_each_hook(block)
+      end
+
+      def add_around_each_hook(&block : Proc(Nil) ->) : Nil
+        current_group.add_around_each_hook(block)
+      end
+
+      protected def build : Array(Example)
+        # TODO
+        ExampleGroup.new
+      end
+    end
+  end
+end
diff --git a/src/spectator/dsl/example_group_builder.cr b/src/spectator/dsl/example_group_builder.cr
new file mode 100644
index 0000000..407cfa2
--- /dev/null
+++ b/src/spectator/dsl/example_group_builder.cr
@@ -0,0 +1,41 @@
+module Spectator
+  module DSL
+    class ExampleGroupBuilder
+      @children = [] of ExampleFactory | ExampleGroupBuilder
+      @before_all_hooks = [] of ->
+      @before_each_hooks = [] of ->
+      @after_all_hooks = [] of ->
+      @after_each_hooks = [] of ->
+      @around_each_hooks = [] of Proc(Nil) ->
+
+      def add_child(child : ExampleFactory | ExampleGroupBuilder) : Nil
+        @children << child
+      end
+
+      def add_before_all_hook(&block : ->) : Nil
+        @before_all_hooks << block
+      end
+
+      def add_before_each_hook(&block : ->) : Nil
+        @before_each_hooks << block
+      end
+
+      def add_after_all_hook(&block : ->) : Nil
+        @after_all_hooks << block
+      end
+
+      def add_after_each_hook(&block : ->) : Nil
+        @after_each_hooks << block
+      end
+
+      def add_around_each_hook(&block : Proc(Nil) ->) : Nil
+        @around_each_hooks << block
+      end
+
+      def build : Array(Example)
+        # TODO
+        Array(Example).new
+      end
+    end
+  end
+end
diff --git a/src/spectator/dsl/structure_dsl.cr b/src/spectator/dsl/structure_dsl.cr
index 5159a7e..d193bdf 100644
--- a/src/spectator/dsl/structure_dsl.cr
+++ b/src/spectator/dsl/structure_dsl.cr
@@ -12,17 +12,17 @@ module Spectator
         module Group%group
           include {{@type.id}}
 
-          ::Spectator::Definitions::GROUPS[\{{@type.symbolize}}] =
-            ExampleGroup.new(
-              {{what.is_a?(StringLiteral) ? what : what.stringify}},
-              ::Spectator::Definitions::GROUPS[{{@type.symbolize}}]
-            )
-
           {% if what.is_a?(Path) || what.is_a?(Generic) %}
             _described_class {{what}}
           {% end %}
 
+          ::Spectator::DSL::Builder.start_group(
+            {{what.is_a?(StringLiteral) ? what : what.stringify}}
+          )
+
           {{block.body}}
+
+          ::Spectator::DSL::Builder.end_group
         end
       end
 
@@ -54,15 +54,14 @@ module Spectator
           end
           %to_a = Collection%collection.new.%to_a
 
-          ::Spectator::Definitions::GROUPS[\{{@type.symbolize}}] =
-            GivenExampleGroup(typeof(%to_a.first)).new(
-              {{collection.stringify}},
-              %to_a,
-              :%group,
-              ::Spectator::Definitions::GROUPS[{{@type.symbolize}}]
-            )
+          ::Spectator::DSL::Builder.start_given_group(
+            {{collection.stringify}},
+            %to_a
+          )
 
           {{block.body}}
+
+          ::Spectator::DSL::Builder.end_group
         end
       end
 
@@ -115,23 +114,23 @@ module Spectator
       end
 
       macro before_all(&block)
-        ::Spectator::Definitions::GROUPS[{{@type.symbolize}}].before_all_hooks << -> {{block}}
+        ::Spectator::DSL::Builder.add_before_all_hook {{block}}
       end
 
       macro before_each(&block)
-        ::Spectator::Definitions::GROUPS[{{@type.symbolize}}].before_each_hooks << -> {{block}}
+        ::Spectator::DSL::Builder.add_before_each_hook {{block}}
       end
 
       macro after_all(&block)
-        ::Spectator::Definitions::GROUPS[{{@type.symbolize}}].after_all_hooks << -> {{block}}
+        ::Spectator::DSL::Builder.add_after_all_hook {{block}}
       end
 
       macro after_each(&block)
-        ::Spectator::Definitions::GROUPS[{{@type.symbolize}}].after_each_hooks << -> {{block}}
+        ::Spectator::DSL::Builder.add_after_each_hook {{block}}
       end
 
       macro around_each(&block)
-        ::Spectator::Definitions::GROUPS[{{@type.symbolize}}].around_each_hooks << Proc(Proc(Nil), Nil).new {{block}}
+        ::Spectator::DSL::Builder.add_around_each_hook {{block}}
       end
 
       def include_examples