Mouse Trap Cars

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Blog entry by wichle posted 01-08-2011 07:26 AM 5247 reads 0 times favorited 7 comments Add to Favorites Watch

OK! I love getting in the shop with my grandson. He announced tonight he has to build a Mouse Trap Car!!! I Googled same and there are lots of ideas. If any of you have put together one of these, SUCCESSFULLY” I’d appreciate any hints. We are looking for distance, not speed. Sounds like fun . . . I think!


-- Bill, Michigan "People don't come preassebled, but are glued together by life"

7 comments so far

View KLorts's profile


10 posts in 4144 days

#1 posted 01-08-2011 07:38 AM

Use roller blade bearings on the axles it will keep it rolling for quite a while I have heard of people having luck using cds as wheels but I feel like the torque from the trap would cause them to spin but they do roll for a long time. you need to slow the trap down so that it progressively pulls faster to prevent slipping this all has to do with the way you rig your trap to the axle. Hope this helps and the best way to learn is by trying so try a few set ups and see what works best.

View JKBogle's profile


40 posts in 4272 days

#2 posted 01-08-2011 02:52 PM

I made one of those in high school for physics class.

1. Adhere sandpaper to the wheels to prevent spinning when the car first starts.
2. Make the rear wheels large. Think gear reduction in comparison to the rear axle (small) and the rear wheels (large).
3. Add an extension arm on to the part that swings down to kill the mouse. It gives you a longer arch of motion allowing you to use a longer string which allows the car to be powered longer.

Good luck and have fun!

View Bearpie's profile


2601 posts in 4352 days

#3 posted 01-08-2011 04:03 PM

Go to the hardware store ask for 4 small wheels with 4 nails, ask for a mousetrap and attach the wheels to it and you now have a mousetrap car that will drive to where the mice are! ;-)

Tip: If you put larger wheels on the rear of the mousetrap it will make the car roll downhill and will go “practically forever”! LOL

Erwin, Jacksonville, FL

-- Erwin, Jacksonville, FL

View TJ65's profile


1432 posts in 4384 days

#4 posted 01-09-2011 12:52 AM

Hey ask LJer Mad I saw one on his bench in one of his photos recently

-- Theresa,

View grub32's profile


215 posts in 4383 days

#5 posted 01-09-2011 03:49 AM

I have built lots of these…here are my suggestions….use old records for the wheels. Take the spring off and give it an extra wrap. Use a long dowel rod to attach string to the back axle. Coat the wheels in tool hanlde epoxy for traction and have fun. Make sure to post the final product.


-- Educator by Day, Wood Butcher by Night!!

View mafe's profile


13681 posts in 4424 days

#6 posted 01-09-2011 03:54 AM

I’m here!!!

First of all you need to find the right mouse!

Then this! Remember the sting must be able to let go once the trap is down!

This guy explains well:

But why settle with a car?

Best thoughts,

-- MAD F, the fanatical rhykenologist and vintage architect.

View craigo's profile


3 posts in 4339 days

#7 posted 01-09-2011 08:15 PM

Using old records is a great idea. Another one that we had success with in High School was instead of using a string, use a rubber band cut so it is not a loop anymore. When winding it up on the axle keep tension on the rubber band. We also extended the trap (the spring part) with wood so it has a longer pull. We had some go close to 100 yards with that setup.

Obviously when you run these you need some little metal eye hooks screwed in the bottom of the car and guided onto fishing line, so the car goes straight.

-- Just doing what I do

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