Hi Pg, I think you will find that story is "The Fox and the Forest", which is collected in the following Bradbury books:

The Illustrated Man
The Vintage Bradbury
The Stories of Ray Bradbury

It has also appeared under the title "The Fox IN the Forest", and was originally published as "To The Future". It has been collected once under this title, in a chapbook called The Dragon Who Ate His Tail.

I hope this helps!

I dig "Jack In The Box." The way the kid is sheltered from reality by his mother, the teacher. Then how the child's whole world changed and opened up when he left the confines of his home.