Ohhh this is such a cute craft idea! A few of us tried paper chain caterpillars with our kids last year and honestly, the best part is letting them pick their own colors, my daughter did rainbow, my friend's son did all green like a "real" caterpillar. Super simple to do, just loop and glue the paper strips together, and you can make it as long or as short as you want depending on how patient the kids are feeling that day!