M.A.S.S. Trap — Science Fair Experiment Helper
SCAN THE QR ON YOUR KID'S DASHBOARDYour kid is using a M.A.S.S. Trap (Motion Analysis & Speed System) — a device built from a $7 microcontroller that turns a Hot Wheels track into a real physics laboratory.
It measures how fast toy cars roll down a track with microsecond precision (that's millionths of a second). The system then calculates speed, momentum, and kinetic energy — the same physics NASA uses to plan rocket launches.
The science fair experiment uses this to test a question like: "Does adding weight to a car make it go faster?"
When Ryan was a kid in Utah, his class got an assignment based on Gulliver's Travels — the one with the Lilliputians. Build something tiny and scale it up ginormous. That was it. That was the whole prompt.
His father Richard was a general contractor. They were flat broke. But Richard dropped everything, and that weekend Ryan watched the master at his craft — picking out a huge piece of timber at the lumber yard, sitting on the curb outside while his dad struggled through the complex math of angles and hexagons (the bestagons, you know), laying the entire thing out on the edge of a ten-foot beam.
Then came the sawdust. The thin strips gently falling to the floor, covering them both in a cloud of progress. And through the haze emerged a dad standing at least a foot taller — holding a seven-foot-long #2 pencil, complete with a #10 coffee can and green florist foam for the eraser.
To this day, Ryan believes that pencil still hangs in the lobby of Park City Middle School.
The system walks your kid through 6 phases, like a detective processing a crime scene. Here's the big picture:
Pick what you're testing and define your variables. Like choosing which case to investigate.
Select which cars to use and check their weights. Like booking suspects into the precinct.
Each test run gets a case number. Print tags and take photos BEFORE testing — like documenting a crime scene before you touch anything.
Review the test plan one last time. Like a pilot's checklist before takeoff — once data collection starts, you're committed.
THE RACING! The system tells your kid which car to use, when to add weight, and records everything automatically.
Export data, see the summary, and generate the science fair report. The evidence tells the story.
These are the science words your kid needs to know (and the judges will ask about):
This is where the forensic theme really kicks in. Every test run gets assigned a case number (like MASS26-0001).
This is the fun part — the actual racing! But it's STRUCTURED racing.
Don't know what to say? Pick any of these. They're designed to get your kid THINKING, not just clicking.
The phone/tablet lost WiFi connection to the M.A.S.S. Trap. Check that you're connected to the right WiFi network and refresh the page. Your data is saved — it will pick up where you left off.
The car didn't break the finish sensor, or something was blocking it. Hit RETRY. Make sure nothing is sitting on or near the sensors.
Something triggered both sensors almost simultaneously. Usually means the car was pushed, bounced, or something flew through the sensor. RETRY if the car wasn't released properly. KEEP if the car was just genuinely fast.
No panic! Open the dashboard again and it will restore exactly where you left off. All data is saved after every run, both on the phone and on the ESP32 device.
Dry Run mode is enabled. Case numbers starting with "DRY" are test runs that don't save real data. Look for the orange "DRY RUN" banner at the top. Turn it off for the real experiment.
The photo upload needs an internet connection (it uploads to a cloud service). The M.A.S.S. Trap itself doesn't need internet for timing and data — only photos require it. You can always add photos later.
Here's the rubric breakdown and how M.A.S.S. Trap helps hit every point:
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