I already have the first set of these, but does the bonus episode It's Magic Charlie Brown, include Lucy ice skating? I've been looking for that episode- I loved this one and had it on VHS taped when I was little!
The episode "It's Magic, Charlie Brown" doesn't have Lucy ice skating. It's about Snoopy, who gets a book on magic tricks and performs tricks at a magic show for the Peanuts gang. He turns CB invisible.
I don't know which episode where Lucy is skating is from, unless it's the "A Charlie Brown Christmas" that you're thinking of, which has the gang ice skating during the opening. The bonus episode for ACBC, "It's Christmas Time Again, Charlie Brown," doesn't have Lucy ice skating either.
Maybe the episode that you're thinking of is from "I Want A Dog For Christmas, Charlie Brown." That's the other winter/holiday special that I remember.
I'm not sure about a Lucy skating special, but there was a special about Peppermint Patty as a figure skater ... it's called "She's a Good Skate, Charlie Brown". Other than that, the only Lucy skating I can remember is from the Christmas one.
The bonus episode here is just about Snoopy putting on a magic show.