Big Arm Drawing and Crossing the Midline

Crossing the midline means reaching one hand across the middle of the body to the other side. Big drawing games like sweeping rainbows, figure eights and long mermaid tails help children practise it, which supports reading, writing and coordination.

Imagine an invisible line running down the middle of your body. Crossing the midline happens every time your right hand reaches to the left side, like when you scratch your left ear with your right hand. Young children often avoid it, switching hands instead of reaching across.

Why it matters

Being comfortable crossing the midline helps kids:

• Read across a page without losing their place.
• Write a full line of text without switching hands.
• Develop a clear dominant hand.
• Coordinate both sides of the body in sports and play.

Most children are crossing the midline comfortably by around age 4 to 6. Drawing big is one of the most enjoyable ways to practise.

Big arm drawing games

• Rainbow arcs. Tape a big sheet to the wall. Draw rainbows from far left to far right without switching hands.
• Lazy eights. Draw a sideways figure eight, over and over, tracing it in different colors.
• Road race. Draw a long racetrack across a big sheet, then drive a toy car along it.
• Wave pool. Draw waves across the whole page.
• Mermaid tails. Long, curving tails are perfect midline practice.

Draw something magical across the page

Mermaids, unicorns and flowing hair are full of long, sweeping lines. How to Draw: Mermaids, Unicorns, and Other Cute Stuff gives kids characters with swishy tails and manes. Draw them big on a large sheet taped to the wall or floor, and encourage your child to draw each curve in one long sweep.

Set up for success

• Use large paper: butcher paper, the back of wrapping paper, or flattened boxes.
• Stand at a wall or easel instead of sitting.
• Place the paper in the middle of the body so the arm must travel across.
• Use chunky crayons or chalk for big, easy marks.

Outdoor version

Sidewalk chalk is perfect for big drawing. Make a long snake, a giant sun or a road for bikes. For more whole-body drawing ideas, see drawing big with sidewalk chalk.

If your child always switches hands

Some switching is normal in young children. If your child is over 6 and still avoids crossing the midline, or has not settled on a dominant hand, mention it to their teacher or an occupational therapist.

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