sug ‧ gest ‧ i ‧ ble /səˈdʒestəb ə l, səˈdʒestɪb ə l $ səɡ-/ BrE AmE adjective
[ Word Family: noun : ↑ suggestion , ↑ suggestiveness ; adjective : ↑ suggestive , ↑ suggestible ; verb : ↑ suggest ; adverb : ↑ suggestively ]
easily influenced by other people or by things you see and hear
very/highly/extremely suggestible
At that age, kids are highly suggestible.