Loading...
Uploaded by irojoto on Mar 14, 2009
Had a science project, "youtubed" other marble roller coasters for the idea. My son came in 1st place for the longest run which was over 30 seconds (this run was over 40). The second place kid's marble ran 3 seconds.
Science & Technology
Standard YouTube License
yyyaaawwwnnn!
shadow3852 11 months ago
great vortex!
bhav1110 2 years ago
Load more suggestions
yyyaaawwwnnn!
shadow3852 11 months ago
great vortex!
bhav1110 2 years ago