Takaharu Tezuka - The best kindergarten you've ever seen

Link: The best kindergarten you've ever seen

1. a boundary - a real or imagined line that limits something
This book blurs the boundary between right and wrong.
A big river formed the boundary between two kingdoms.

2. a well - a deep hole in the ground from which one can get water/oil/gas
A little girl fell into a well and drowned.
The last well in the village dried up last week what terrified us.

3. skylight - a small window built into a roof to allow light in
I put in a skylight to make the attic brighter.
Tom worked for skylight maufacturing company in 1995.

4. resilient - able to quickly recover or return to previous good condition
Luke seems to be very resilient to pain.
It's hard to make computers resilient to viruses.

5. to tumble - to fall quickly without control
Luna tumbled down the stairs and broke her leg.
Chris tumbled over a chair when he ran into my room.