four cute cartoon caterpillars, various colors, patterns playful childrens . handdrawn

cartoon caterpillars cute colors patterns playful children illustration handdrawn insects cheerful smiling faces colorful segmented bodies kids book characters collection whimsical drawing bright primary bug larva nature animal creature design fun happy adorable artwork graphics doodle vibrant yellow green red blue spots stripes juvenile nursery educational learning biology entomology vector four various hand drawn caterpillar