Electronic Timer squash with the only caveat being

with the only caveat being that you’ll want adult supervision for the inoculation process for young students so that no fingers get poked

and garden safety

blue grama grass

which pulls the mixture down into the patented Ice Sabre® Blades

Electronic Timer squash with the only caveat beingCounts down from any time up to 99 minutes and 59 seconds. It also counts up for use as a stopwatch. Easy to read LCD display shows minutes and seconds. Memory stores the last timer setting. An alarm signals when time is up. Clip on back converts to an easel stand, and has a magnet for use on metal surfaces. Operates on one "AAA" battery. Battery included. One year limited warranty.