Grammar Check for a 7-Year-Old: Moles and Shoulder Mobility

Here is a clear, corrected version suitable for a 7-year-old:

Original: Moles are dark spots on the skin. They appear from the sun or are present at birth. The shoulders are extremely mobile. They help you move your arms in different directions and in a circle.

Corrected:

1. Moles are dark spots on the skin. They can be present at birth or appear because of the sun.
2. The shoulders are very mobile. They help you move your arms in many directions and in circles.

Notes for correctness:

• Use "present at birth" instead of "are present at birth" for smoother wording when paired with "can be" or as a standalone sentence.
• Use "very mobile" instead of "extremely mobile" for simplicity appropriate for a 7-year-old, but both are correct.
• Clarify the idea of circular movement with a simple phrase: "move... in circles".