Lack of vertical information has long been considered one of the largest obstacles to realistic sound reproduction.

Less realistic sound effects are digitally synthesized or sampled and sequenced (the same recording played repeatedly using a sequencer).

Due to limitations of the toy's technology, most of the sounds were rendered as beeps rather than a realistic sound effect.

Since 1995 it has been on display again, together with artificial terrain and hidden speakers playing realistic sound effects.

The series gained popularity thanks to its relatable characters, full symphonic soundtrack, realistic sound effects, high production values and documentary style format.