Danny Dunn, Time Traveler

The Danny Dunn series was definitely the most popular science fiction books for children during the 1960's. If I remember the storyline correctly, Danny Dunn was a teenager(?) who lived with his mother who worked as a livein housekeeper for Prof. Bullfinch, an inventor. The Professor was a father figure and mentor for the young Danny. Each story centers around some new invention that the Professor has invented and the adventures that Danny gets involved in along with his best friend Joe and girl friend Irene. (If I remember the names correctly.) Unfortunately, the "science" of these books is a little outdated since some of the inventions that appear (like a personnal computer in "The Homework Machine") have moved from "fiction" to "fact". Still, it was a very enjoyable series and I would love to see them back in print. The "Time Traveler" story is very similar to the storyline of the "Back to the Future" movies. Prof. Bullfinch invents a time machine which transports his entire house, along with the Professor, Danny and Joe inside, back to the 18th century and it appears in the backyard of Benjamin Franklin. Unfortunately, since there is no electricity coming to his house in the 18th century, the Professor cannot power his time machine to take them back to the future. They enlist the help of Benjamin Franklin and ... well, you can guess what happens next.