Whimsical Four Cartoon Insect Characters Replace

Create a whimsical design featuring four cartoon insect characters. Replace their original features:

1. Change the first insect from a striped body to a polka-dotted one, with smaller antennae.
2. Transform the second insect into a butterfly with larger, wavy wings and a playful expression.
3. Modify the third insect to have a rounded body like a ladybug but give it spiky legs.
4. Make the final insect a quirky caterpillar with segments and gentle eyes.

Surround them with a swirling abstract background of organic shapes and bubbles, ensuring no brand references are present.