What would be good alternatives that could replace the phrase "dress up" in this context?
Native speaker’s answer
Rebecca
In this context, you could say "put costumes on", "clothe", or simply "dress" without "up". In the context of putting on a costume for fun and entertainment, you could also use the word "fancy dress". Ex: They put hot dog costumes on their dogs. Ex: They clothe their dogs as hot dogs. Ex: They dress their dogs as hot dogs. Ex: The dogs went to the party in fancy dress as hot dogs.