Stem boxes for kids are still an innovative and fresh theory thatI have already now been using to store my kids’ supplies in. Stem boxes for kids are also called technology crates or wooden crates,a special kind of container used to move substances,supplies and parts within a controlled atmosphere. These were manufactured by the U.S. Navy in the 1950s being an effective and safe way of storing and hauling equipment. It’s called the stem since it stands up unlike the plastic boxes many of us are familiar with that slide .