My children love quilling just like I do, and I keep saying this craft is suitable for kids. Here's just one example. Some time ago my eldest daughter who is 8 years old created this blue dragonfly. She saw me making the flower with curled petals, and wanted to use the same technique for dragonfly's wings. She used the standard 1/8"-wide quilling strips (hand-cut). The dragonfly measures about 2 3/8" (6 cm) in length, 2 1/8" (5.5 cm) wingspan.
Those of you who are going to try quilling with children might like the article Paper quilling for kids: 10 tips I wrote earlier. Links to other examples of quilled insect designs can be found in this round-up post: Insects — quilling designs.
By the way, when I say "my children" that means also two 6-year-olds, including a boy :)