The sleeping bag was invented in the 19th century, though the inventor is disputed. Suggestions range from French customs officers to Norwegian explorers. However, experts would probably agree that Mouse is the inventor of the mouse-sized sleeping bag.
The self-inflating raft is never used in episode 103, but it does get well used in other episodes.
The fastest time to hop one mile on one leg is 18 minutes and 25 seconds.
The design for Cat's tent, seen in episode 103, was created after researching numerous high tech mountaineering tents and is technically correct.
"Dark Tonight", from episode 103, is the first of many songs that Mouse and friends sing! Lisa Loeb and Richard Jacques wrote the music and many of the lyrics for the songs in the series.