Grow on Earth Grow with Mars
yeah, the price is sweet and it is very practical.Some days a little bottom heat literally works wonders.
I used to sprout seeds on top of my VCR, it was always warmish to the touch.
None of my household gizmos generate noticeable heat while idling away these days.
I've been trying to find a Video Cassette Player to sprout seeds with at the Goodwil old donated stuff charity store but no luck. This style of heat mats sure makes a good substitute though. lol