These are what we call the 'YMMV items.' Things that some people find in this work. We call them 'your mileage might vary' because not everyone sees these things in the same way. This starts discussions in the trope lists, a thing we don't want. Please use the discussion page if you'd like to discuss any of these items.
Discontinuity: A cross-media example- In the earlier DVDs, it's established that Tad, Leap, Lily and the rest of the Learning Friends all live in Alphaville. Now, it's established that Scout and Friends live in Shapeville, given the name of the park and how it's walking distance from their home. This completely throws out the continuity presented by the Clickstart learning computer, which states that Scout is Tad and Dot's dog, indication that the current Scout and Friends DVDs is set in a different universe from the Learning Friends continuity.
Ear Worm: Some of the music played by the toys are very catchy. As are the music in the DVD series. It got so awesome that there were two soundtrack music CD releases.
We love the sounds that letters make / we make them every day...
Tear Jerker: In A Tad OF Christmas Cheer, when Tad does a duet with Mrs. Frog that something is missing. Made especially cruel since Tad is singing it out in the cold, while it's snowing.
Perhaps infamously, the Fly Fusion Pentop Computer. Businessmen and Geeks alike love them so much that it spun off a professional pentop computer product for the adult market segment.
Many of the plush toys manufactured by the company also attracted college students due to their cuteness factor, this was Lampshaded in a Leapfrog commercial in the late 90s/early 2000s. Even today, the Scout and Violet toys don't just attract kids.
The Woobie: Tad, especially in A Tad Of Christmas Cheer