Definition: relating to or resembling a child or childhood; <especially marked by innocence, trust, and ingenuousness>

Saying: You are as young as you feel.

• You can be childlike without being childish. A child always wants to have fun. Ask yourself, ‘Am I having fun?’ — Christopher Peter Meloni (1961-) American actor
• The pursuit of truth and beauty is a sphere of activity in which we are permitted to remain children all our lives. — Albert Einstein (1879-1955) German and American physicist