A boy yawning in bed as he wakes up

Coloring page of a boy yawning in bed as he wakes up

Coloring page of a boy yawning in bed as he wakes up

Downloads as an A4 PDF, ready to print and color.

Did you know?

The circadian cycle is the biological clock that regulates the rhythms of sleep and wakefulness. It syncs with sunlight and lasts about 24 hours.

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