Thanks to Johan Veenstra for the picture of this pack. Casing made of red plastic instead of the usual black. Probably available only in Japan.
The "Sound Kids" series of 6 ROM Packs were designed to accompany the KS-02 (Sound Kids 02) keyboard. The keyboard itself did not include any bundled ROM Packs, but instead featured 6 built-in demo tunes. The ROM Packs had to be purchased separately.