US Kids Golf offers 9 different sizes of Ultralight clubs for beginning golfers. Each set of clubs is made for players within a height range of just three inches.
Ultralight clubs are:
10 to 30 percent lighter than adult clubs;
shaft flexes are built for specific club lengths;
grips are made to fit in young player’s hands;
colorful DV1 driver fits the eye.
Source: US Golf Kids https://www.uskidsgolf.com/shop/equipment/