Ooh! Ooh! I love Bite Size Physics too! We have kind of added it in here and there rather than using it as our main program, but it really is extremely well done. I recommend just getting the book to start with (at Lulu.com), but there are also web classes that I've heard excellent things about.
The two absolute best things about Bite Size Physics IMO are that the experiments are integrated in the text at appropriate points (so it's easy to know what to do when), and the materials really are easy household things -- books, sneakers, string, tennis balls -- and not the "sort of household things" that take three trips to different stores to track down. That has been my one quibble with TOPS Science... when they say "household things" I frequently end up needing to make several phone calls and then driving across town to get that one last important piece that my grandmother might have had on hand eighty years ago but I've never seen in person myself...
