The characters were actually actors in enormously large costumes, not puppets.
The series is about toys in a boy's bedroom that come to life when the boy has left the room or fallen asleep. The series ended in 1995, the same year the film "Toy Story" was released. "Toy Story" is also about a boy's toys that come alive when the boy is not in the room.
Peter Browne (Alfred) and Doug Scroope (Diesel) both played characters in the Australian drama series "Police Rescue".
Victoria the dinosaur, lives in Michael's sister Melissa's bedroom