Question: how acorns grow into trees?
Answer: Collect acorns. Gather some acorns from the ground. ... 
Add acorns to compost. Fill a small flowerpot, yogurt pot or plastic cup with peat-free compost mixed with some sand or sawdust. ... 
Germinate. Place the containers in a cool place out of direct sun, such as a garage, shed or unheated spare room. ... 
Re-pot your seedlings.