Soapsuds are the bubbles that form when you mix soap with water.
Soapsuds are usually seen as a good thing because they mean things are getting clean.
Examples:
I like to play with soapsuds in the bath.
The soapsuds make the dishes clean.
She blows soapsuds from the bubble wand.
The soapsuds are like a fluffy cloud in the sink.
The soapsuds cover the floor like a big white blanket.
Soapsuds are so fun to pop!