When HN users recommended it
1 HN user recommended this in 2012, in one comment.
20072026
Each tall tick is one HN user's first recommendation. A short tick is the same user again. Click a tick to jump to the comment.
1 HN user recommended this in 2012, in one comment.
Each tall tick is one HN user's first recommendation. A short tick is the same user again. Click a tick to jump to the comment.
My child got one of these vinegar and soda rocket kits a few years ago. You can shoot it up all day long for a dollar.
The best part is that you set it up and back away quickly - no Estes electronic remote control firing - because they do tip over and fire sideways from time to time.
http://www.amazon.com/Scientific-Explorers-Meteor-Rocket-Sci...