Wilfried Mueller

Hello,
I can remember a series in the late 60's/early 70's which has been broadcasted in Germany. It definetley was an English series about some children (like the FAMOUS FIVE). They (or some of them) lived on a houseboat. As far as I can remember it have been four kids. The German TV added as the soundtrack Herb Alpert's TIJUANA TAXI and I am not shure if this was in the original production as well.
Furthermore does anybody have a copy of this series or other good series? I could offer a copy of the six part series of FIVE ON TREASURE ISLAND from the 50's.
Please email for other details.
Wilfried

Wilfried Mueller, Germany