Combi's chopsticks have a unique design feature - a molded plastic appendage that is meant to rest in a toddler's palm and help them hold the chopsticks properly, which can be set for right- or left-handed users. The piece can be removed when toddlers are comfortable holding the chopsticks, and the hinge can be taken off completely so the chopsticks can be used as "real" ones, although by that point children might be more comfortable with longer chopsticks, as these are under 15mm long.
Ironically, the slightly increased initial difficulty of using Combi's chopstick design may make it a better trainer for chopstick use, and that is clearly Combi's intention; this makes them stand out from competitors, and we will continue to work with Z to help her learn to use them. They are designed to ensure that children grip them properly, and we suspect the low springiness might also help train children to use real chopsticks, but these features also mean that for very young children they are more difficult to use than other trainers. We recommend them for ages 4 to 6, and believe that for their innovative design, they are a shockingly good value.