Contraption 

what an AWESOME contraption! that must have taken a lot of experimentation. Oh, physics. So cool!

It's one of the best contraptions I've seen. Excellent.

it's a great contraption . I'm going to build my own

Yeah!

Nice contraption, you should definitely make more!!! :P

very nice it looks like you would see that in a museum!!!!!!!!!!

That was the coolest thing i have ever seen

Awesome, all the transitions points were very smooth. But you know the public will crave a multi-ball video as well.

I always wonder why these things amuse people :D

very nice. I suggest you swap the current elevator for a set of claws or hooks on a long bicycle chain, that way you could attach a motor and make the thing automatic. Also, have something hold the door open so that you don't have to open it every time, but so that you can close it when you shut it down. Very good work, though. I probably couldn't have done that.

awesome project you guys put together.

That was AMAZING!

Clever - I like the alternate routes

haha, i thought the video title was "contraception" but it wasn't. cool contraption!

i liked the stairs the best fro sum reason and it took for ever to go down that whole thing( fro got wut it was called lawl) kool thos

I whould by this from you it's so awsome

@1337Vivian "A hobby is an activity or interest that is undertaken for pleasure or relaxation, typically done during one's leisure time." There I made it easy for the people. ;)

that was....AWESOME!

yher it you could have a wheel that picks up a ball and dumps it the other side. or you could have a belt with buckets on it instead of the elevator

amzing

its like rokenbok! except no electricty lol

pretty sweet

Thats pritty cool you know. 10 out of 10

More of a golf ball run then a contraption but still awesome none the less.

this makes normal school look so boring! wish we'd done this when i was a kid :) heck it'd be fun now i'm 22, heh :P

i went to thomas kidd as a student. ah the room brings back memories. wonder how mister mcmath isdoing

wow that was amazing 10000/5

FUCKING AMAZING!!! Thats insane!

cool. is it just for entertainment, or is there some other purpose?

i like it

@arreye318 a perfect response lol

Thats Awesome!!!!

1:22 - I LOLed SO HARE XD ...lol

to much kinetic energy in the bowls

Mr. McMath retired in 2017

cool?that was crappin AMAZING!

cool

nice

kinda cool

Not quite sure why it's cool, it just is :)

im not sure if its your fault im bored or if its the fact that ive been on the computer for 3hrs lolz jking i think that was awesome!

U rlly hav a lot of time on your hands but it's still kool and earth friendly(kid power)

1:13 CREEEEEEEEEEEAK

its nice but its with 2 little girls and not rlly rube goldberg..

perptetual motion is impossible. there has to be a trnafers of energy somewhere

heyy mr.macmath! its manreet and gavin! this is so cool! i wish we still had it on your class!!! :)

YEHHHHH BC LIONS

@arreye318 @livetoskate48 Just cool.

Lol I was in his class last year

lol i should make this out of knex!

lol nice :P

Contraption need to be no handed

@pspguy1234290 why spend money on a motor when you have a perfectly good child there wanting to turn it.......lol great contraption

i thought a contraption was self operated, not manually operated...

how do i make that

put a ping pong ball in it it is better

what was the point? lol

was it funny to build it

tht is not a contraption bro

0:25 Don't they have child labour laws agasnt children under a certain age about working in a industrial or wherever. Because that looks like a important valve for something.... lol

oooh id say about,- two minutes thirteen secs.! Haha j/k!

trbuchet was bettter :)

If you think these guys have no life, then go to a dictionary website and type in "hobby."