All ages admitted. There is no content that would be objectionable to most parents. This is one of only two ratings dating back to 1968 that still exists today.
This is quite a fun story of a caterpillar that just won't fit into it's chrysalis pouch! Luckily it has two friendly bugs nearby who decide they are going to try to help. Unfortunately, he's just had too many good lunches and try as they might it's just not happening. At last they hit on an idea utilsing some string, a branch and a rock! Eureka - it works, then it emerges, a butterfly, then... Hm...