diff --git a/common/elements/v1/base/base.go b/common/elements/v1/base/base.go
new file mode 100644
index 0000000..7f5e1d7
--- /dev/null
+++ b/common/elements/v1/base/base.go
@@ -0,0 +1,38 @@
+package base
+
+import (
+	"image/color"
+
+	"git.vezzani.net/ben/games/common/elements/v1"
+	"git.vezzani.net/ben/games/common/elements/v1/mouse"
+)
+
+type Element struct {
+	mouse.NopHandler
+
+	anchor   elements.Point
+	children []elements.Element
+
+	backgroundColor color.Color
+	name            string // For debugging
+}
+
+func (e *Element) Anchor() elements.Point {
+	return e.anchor
+}
+
+func (e *Element) SetAnchor(a elements.Point) {
+	d := e.Anchor().Delta(a)
+	for _, ch := range e.Children() {
+		ch.SetAnchor(ch.Anchor().Add(d))
+	}
+	e.anchor = a
+}
+
+func (e *Element) Children() []elements.Element {
+	return e.children
+}
+
+func (e *Element) BackgroundColor() color.Color {
+	return e.backgroundColor
+}
diff --git a/common/elements/v1/base/config.go b/common/elements/v1/base/config.go
new file mode 100644
index 0000000..66cfcea
--- /dev/null
+++ b/common/elements/v1/base/config.go
@@ -0,0 +1,29 @@
+package base
+
+import (
+	"image/color"
+
+	"git.vezzani.net/ben/games/common/elements/v1"
+)
+
+type OptFunc func(*Element)
+
+func Children(children ...elements.Element) OptFunc {
+	return func(c *Element) {
+		c.children = children
+	}
+}
+
+func Name(name string) OptFunc {
+	return func(s *Element) {
+		s.name = name
+	}
+}
+
+func (b elements.Builder) BackgroundColor(c color.Color) elements.Builder {
+	return func() elements.Element {
+		ce := b().(*Element)
+		ce.backgroundColor = c
+		return ce
+	}
+}
diff --git a/common/elements/v1/blocks/block.go b/common/elements/v1/blocks/block.go
index cbfd734..241d3c8 100644
--- a/common/elements/v1/blocks/block.go
+++ b/common/elements/v1/blocks/block.go
@@ -1,28 +1,27 @@
 package blocks
 
 import (
-	"image/color"
-
 	"git.vezzani.net/ben/games/common/elements/v1"
-	"git.vezzani.net/ben/games/common/elements/v1/mouse"
+	"git.vezzani.net/ben/games/common/elements/v1/base"
 
 	"github.com/hajimehoshi/ebiten/v2"
 	"github.com/hajimehoshi/ebiten/v2/vector"
 )
 
-func New(ops ...OptFunc) elements.Element {
-	b := Block{}
-	for i := range ops {
-		ops[i](&b)
+type Builder elements.Builder
+
+func New(ops ...OptFunc) Builder {
+	return func() elements.Element {
+		b := Block{}
+		for i := range ops {
+			ops[i](&b)
+		}
+		return &b
 	}
-	return &b
 }
 
 type Block struct {
-	elements.Core
-
-	backgroundColor *color.Color
-	mouse.NopHandler
+	base.Element
 	width, height int
 	name          string
 }
@@ -41,7 +40,7 @@ func (b *Block) Size() (w, h int) {
 
 func (b *Block) Draw(image *ebiten.Image) {
 	bnd := b.Bounds()
-	if b.backgroundColor != nil {
+	if b.BackgroundColor() != nil {
 		vector.DrawFilledRect(
 			image,
 			float32(b.Anchor().X),
diff --git a/common/elements/v1/blocks/options.go b/common/elements/v1/blocks/options.go
index 9644f5f..3c8a011 100644
--- a/common/elements/v1/blocks/options.go
+++ b/common/elements/v1/blocks/options.go
@@ -1,28 +1,23 @@
 package blocks
 
 import (
-	"image/color"
-
 	"git.vezzani.net/ben/games/common/elements/v1"
+	"git.vezzani.net/ben/games/common/elements/v1/base"
 )
 
 type OptFunc func(*Block)
 
-func Core(f elements.OptFunc) OptFunc {
+func Core(f base.OptFunc) OptFunc {
 	return func(b *Block) {
-		f(&b.Core)
+		f(&b.Element)
 	}
 }
 
-func Size(w, h int) OptFunc {
-	return func(b *Block) {
-		b.width, b.height = w, h
-	}
-}
-
-func BackgroundColor(c color.Color) OptFunc {
-	return func(b *Block) {
-		b.backgroundColor = &c
+func (b Builder) Size(w, h int) Builder {
+	return func() elements.Element {
+		bl := b().(*Block)
+		bl.width, bl.height = w, h
+		return bl
 	}
 }
 
diff --git a/common/elements/v1/buttons/options.go b/common/elements/v1/buttons/options.go
index afcde1c..bbb84a2 100644
--- a/common/elements/v1/buttons/options.go
+++ b/common/elements/v1/buttons/options.go
@@ -3,16 +3,16 @@ package buttons
 import (
 	"image/color"
 
-	"git.vezzani.net/ben/games/common/elements/v1"
+	"git.vezzani.net/ben/games/common/elements/v1/base"
 	"git.vezzani.net/ben/games/common/elements/v1/blocks"
 	"git.vezzani.net/ben/games/common/elements/v1/mouse"
 )
 
 type OptFunc func(button *Button)
 
-func Core(f elements.OptFunc) OptFunc {
+func Core(f base.OptFunc) OptFunc {
 	return func(b *Button) {
-		f(&b.Core)
+		f(&b.Element)
 	}
 }
 
diff --git a/common/elements/v1/config.go b/common/elements/v1/config.go
deleted file mode 100644
index 193596e..0000000
--- a/common/elements/v1/config.go
+++ /dev/null
@@ -1,15 +0,0 @@
-package elements
-
-type OptFunc func(*Core)
-
-func Children(children ...Element) OptFunc {
-	return func(c *Core) {
-		c.children = children
-	}
-}
-
-func Name(name string) OptFunc {
-	return func(s *Core) {
-		s.name = name
-	}
-}
diff --git a/common/elements/v1/element.go b/common/elements/v1/element.go
index 3f33463..6c04531 100644
--- a/common/elements/v1/element.go
+++ b/common/elements/v1/element.go
@@ -12,6 +12,8 @@ type Element interface {
 	Children() []Element
 }
 
+type Builder func() Element
+
 type Point struct {
 	X, Y int
 }
@@ -38,26 +40,3 @@ type Bounds struct {
 func (b *Bounds) Contains(p Point) bool {
 	return p.X >= b.Min.X && p.X <= b.Min.X+b.Width && p.Y >= b.Min.Y && p.Y <= b.Min.Y+b.Height
 }
-
-type Core struct {
-	anchor   Point
-	children []Element
-
-	name string // For debugging
-}
-
-func (c *Core) Anchor() Point {
-	return c.anchor
-}
-
-func (c *Core) SetAnchor(a Point) {
-	d := c.Anchor().Delta(a)
-	for _, ch := range c.Children() {
-		ch.SetAnchor(ch.Anchor().Add(d))
-	}
-	c.anchor = a
-}
-
-func (c *Core) Children() []Element {
-	return c.children
-}
diff --git a/common/elements/v1/stacks/options.go b/common/elements/v1/stacks/options.go
index cefb6c9..bfd77d1 100644
--- a/common/elements/v1/stacks/options.go
+++ b/common/elements/v1/stacks/options.go
@@ -1,12 +1,14 @@
 package stacks
 
-import "git.vezzani.net/ben/games/common/elements/v1"
+import (
+	"git.vezzani.net/ben/games/common/elements/v1/base"
+)
 
 type OptFunc func(*Stack)
 
-func Core(f elements.OptFunc) OptFunc {
+func Core(f base.OptFunc) OptFunc {
 	return func(s *Stack) {
-		f(&s.Core)
+		f(&s.Base)
 	}
 }
 
diff --git a/common/elements/v1/stacks/stack.go b/common/elements/v1/stacks/stack.go
index d4792af..98ecd7b 100644
--- a/common/elements/v1/stacks/stack.go
+++ b/common/elements/v1/stacks/stack.go
@@ -29,7 +29,7 @@ func New(ops ...OptFunc) elements.Element {
 }
 
 type Stack struct {
-	elements.Core
+	elements.Base
 	mouse.NopHandler
 	horizontal bool
 }
diff --git a/tools/component_test/editor.go b/tools/component_test/editor.go
index 35faa44..a03b832 100644
--- a/tools/component_test/editor.go
+++ b/tools/component_test/editor.go
@@ -3,52 +3,54 @@ package main
 import (
 	"git.vezzani.net/ben/games/common/elements/v1"
 	"git.vezzani.net/ben/games/common/elements/v1/blocks"
-	"git.vezzani.net/ben/games/common/elements/v1/buttons"
 	"git.vezzani.net/ben/games/common/elements/v1/mouse"
-	"git.vezzani.net/ben/games/common/elements/v1/stacks"
 	"git.vezzani.net/ben/games/common/sprites/v1"
 
 	"github.com/hajimehoshi/ebiten/v2"
 	"golang.org/x/image/colornames"
 )
 
-var root = stacks.New(
-	stacks.Horizontal(),
-	//stacks.Core(blocks.BackgroundColor(color.White)),
-	stacks.Core(elements.Name("parent")),
-	stacks.Core(elements.Children(
-		stacks.New(
-			stacks.Core(elements.Name("left")),
-			stacks.Core(elements.Children(
-				buttons.New(
-					buttons.BlockOpt(blocks.Size(100, 100)),
-					buttons.Label("hello"),
-					buttons.BlockOpt(blocks.BackgroundColor(colornames.Green)),
-					buttons.OnClick(func(ms mouse.State) {
-						println("green")
-					}),
-				),
-				blocks.New(
-					blocks.Size(100, 100),
-					blocks.BackgroundColor(colornames.Yellow),
-				),
-			)),
-		),
-		stacks.New(
-			stacks.Core(elements.Name("right")),
-			stacks.Core(elements.Children(
-				blocks.New(
-					blocks.Size(100, 100),
-					blocks.BackgroundColor(colornames.Blue),
-				),
-				blocks.New(
-					blocks.Size(100, 100),
-					blocks.BackgroundColor(colornames.Red),
-				),
-			)),
-		),
-	)),
-)
+//var root = stacks.New(
+//	stacks.Horizontal(),
+//	//stacks.Element(blocks.BackgroundColor(color.White)),
+//	stacks.Element(elements.Name("parent")),
+//	stacks.Element(elements.Children(
+//		stacks.New(
+//			stacks.Element(elements.Name("left")),
+//			stacks.Element(elements.Children(
+//				buttons.New(
+//					buttons.BlockOpt(blocks.Size(100, 100)),
+//					buttons.Label("hello"),
+//					buttons.BlockOpt(blocks.BackgroundColor(colornames.Green)),
+//					buttons.OnClick(func(ms mouse.State) {
+//						println("green")
+//					}),
+//				),
+//				blocks.New(
+//					blocks.Size(100, 100),
+//					blocks.BackgroundColor(colornames.Yellow),
+//				),
+//			)),
+//		),
+//		stacks.New(
+//			stacks.Element(elements.Name("right")),
+//			stacks.Element(elements.Children(
+//				blocks.New(
+//					blocks.Size(100, 100),
+//					blocks.BackgroundColor(colornames.Blue),
+//				),
+//				blocks.New(
+//					blocks.Size(100, 100),
+//					blocks.BackgroundColor(colornames.Red),
+//				),
+//			)),
+//		),
+//	)),
+//)
+
+var root = blocks.New().
+	Size(100, 100).
+	BackgroundColor(colornames.Red)
 
 func newEditor() *editor {
 	return &editor{}
@@ -57,6 +59,7 @@ func newEditor() *editor {
 type editor struct {
 	bounds      elements.Bounds
 	handleMouse func() bool
+	root        elements.Element
 }
 
 func (e *editor) Update() error {
@@ -66,7 +69,7 @@ func (e *editor) Update() error {
 }
 
 func (e *editor) Draw(screen *ebiten.Image) {
-	root.Draw(screen)
+	e.root.Draw(screen)
 }
 
 func (e *editor) Layout(outsideWidth, outsideHeight int) (screenWidth, screenHeight int) {
@@ -76,7 +79,8 @@ func (e *editor) Layout(outsideWidth, outsideHeight int) (screenWidth, screenHei
 			Width:  outsideWidth,
 			Height: outsideHeight,
 		}
-		e.handleMouse = mouse.Handler(root)
+		e.root = root()
+		e.handleMouse = mouse.Handler(e.root)
 	}
 
 	return outsideWidth, outsideHeight