This massive digital wall clock uses super bright red LEDs to illuminate huge 15 inch tall numbers that can be seen from hundreds of feet away.
Learn about super cold dry ice by making fun smoke-filled bubbles that can be held, rolled, bounced, and then popped into a burst of smoke.
This simple, battery-free mechanical timer can be set with just a twist of a dial and the remaining time in red can be easily read with just a glance.
