One day, When I am with my 3 year baby, he was with his bicycle riding on the road. I saw a big pot hole on the road and I want to tell him to be careful about the pothole. But I could not get the proper phrase to say it to him.
What is the sentence/dialogue I should have used in that situation to tell him not hit the pot hole and go around it for safe ride?
As was shared in the comments, there are a few idiomatic ways you could say this.
When you are riding your bike with your child, and you suddenly see a hazard, the phrases "Watch out" or "Look out" are commonly used:
Watch out for the pothole!
Look out! There's a pothole!
However, when your child is old enough to ride on his own, and he tells you where he plans to go ride his bike in an area you know is riddled with potholes, you might use a phrasing that has less urgency:
Mind the potholes!
or:
Keep an eye out for potholes.
