Dust bunnies

Dust bunnies are clumps of lint and light debris that form in areas of a home that aren't cleaned or traversed regularly.

A colony of dust bunnies live under a couch in the playroom as seen in the 2018 Muppet Babies episode "One Small Problem".

Summer Penguin encounters them when Baby Bunsen's Enlarge-O-Ray shrinks her down to miniature proportions and she ventures under the couch to retrieve Baby Kermit's toy car. The dust bunnies attempt to keep the lost item, protecting their new property by merging together into one large dust bunny, but Summer drives the car off a paperclip ramp, disperses the mecha-dust bunny, and escapes their domain.