those are just words, made up by Boris Zakhoder - the translator of Winnie-the-Pooh. According to the translation - those are different types of songs made up and performed by Winnie.
"кричалки" - from "кричать" - "to scream"
"вопилки" - "вопить" - "to shout"
"шумелки" - "шуметь" - "to make noise"
"пыхтелки" - "пыхтеть" - "to puff/to pant"
"сопелки" - "сопеть" - "to wheeze"

those are substantivized verbs, metioned above

Maybe like “witty ditties” these could be “shoutty ditties”, “noisy ditties”, “puffty ditties”, “wheezti ditties” ))