You can add 3-10 heart shape pendants to the necklace and engrave the names of the children and the grandparents on the pendants.
Bracelet
EXTENDER LENGTH: 3.81 Cm, 1.5''
LENGTH : 17.145 Cm, 6.75''
WEIGHT G: 4.45
Pendant
FINISH: Polished
LENGTH : 1.2 Cm, 0.47''
WEIGHT G: 0.45