In Mission 2 your teen fences in a garden so their dog can play safely. It’s really a lesson in perimeter, testing an idea, and why gates exist.
What the mission builds
- Perimeter. Counting every fence piece around the edge is the perimeter, without anyone calling it that.
- Shapes and corners. Square, rectangle or L-shape? Each one needs a different number of fences.
- Testing an idea. The finish line is a test: walk the dog in, close the gate, and check it can’t get out. If it can, fix it and say what changed.
- Caring for an animal. The whole build is about keeping a pet safe and happy.
A conversation starter
“Why do real gardens and parks have fences and gates?”
Then try a puzzle: “Which shape would need the fewest fences for the same amount of space?” (Squares win among rectangles. Circles beat everything, but they’re tricky in blocks.)
Try it off-screen
Walk around a real garden, park or playground and count your steps along each side. Add them up: that’s its perimeter in steps. Who in the family has the longest stride?
See Mission 2 · Missions 1–5 are free as full printables.