Danny, Irene, Joe, and Professor Bullfinch launch themselves on an amazing journey -- through time! They land in the year 1763 and one of the first people they

Danny uses a computer that Professor Bulfinch has created for NASA to prepare his homework, despite Professor Bullfinch's warning that Danny is to leave the mac

Through a mishap in Professor Bulfinch's laboratory, Danny accidentally creates an anti-gravity paint. The natural use, of course, is for a spaceship -- the pai

A mistake by Danny leads to one of the Professor';s most startling inventions—ISIT, the Invisibility Simulator with Intromittent Transmission—a dragonfly-li

By accidentally short-circuiting Professor Bulfinch's new crystalline material, Danny Dunn enables the professor to create a new machine that makes Danny invisi