/-/https/www.sciencebuddies.org/cdn/Files/21464/5/sb-logo.png){kind=logo}
/-/https/www.sciencebuddies.org/cdn/Files/21464/5/sb-logo.png){kind=logo}
Image Credit
/-/https/www.sciencebuddies.org/cdn/Files/14836/7/automaton-where-have-hole.jpg)
Description:
A cardboard tube pressed against the side panel of a shoebox so that the bottom of the tube aligns with the lower edge of the box.
Source:
Sabine De Brabandere, Science Buddies
License:
Science Buddies
/-/https/img.youtube.com/vi/zYl6MCKW5Ec/0.jpg)
/-/https/img.youtube.com/vi/8smNcRl_YZk/0.jpg)
/-/https/img.youtube.com/vi/y7v1xHn3Vmw/0.jpg)