The other bears were all so impressed with the bat which the two of them had made, that they all helped to make even more - and they ended up with a whole bunch of them - they don't know if bunch is the right word for lots of bats, so they asked Scary to look it up and it turns out that they should be saying a colony or cloud of bats - they wondered what it is for bears? Perhaps that's something you can look up?
Anyway, you could make some decorations for your Halloween party too. You can follow the bears' previous instructions for making spiders, and you can follow the pictures here and try making your own bats too! Use their bat template and make them bigger or smaller and make the folds where they are marked on the picture. They hung their spiders and bats from a windowsill, and they all bounced around together!