Like most things nowadays, hi-fi has a thriving second-hand market, and with good reason: it lasts. Sure, software that ...

Q. Dear Umbra, I want to buy some mats for my 4-year-old to play on and do gymnastics at home. All the “nontoxic” kids’ playmats seem to be made of EVA foam, but I have the impression that ...

FitRx 24-by-24 EVA Foam Floor Mats, $50 (was $80) at Walmart. Courtesy of Walmart. Covering up to 96 square feet, this FitRx set is a perfect addition to any home gym layout.

The general design of the Biblio-Mat was made to match the vintage feel of The Monkey’s Paw, which can be seen from the colors and lettering used on the machine to the second-hand books that ...