Children's Book Series About Time Travel. Frizzle takes her class on a journey. The time machine by h g wells
[tomt] [book] time travel children's book series solved there was a series, perhaps a trilogy, that had a brother and sister move to a new place for the summer and they meet two friends and somehow time travel. Wonderful deeds and doings of little giant boab and his talking raven tabib; The readers travel and learn with the frog creek, pa time travelers.
Taylor also has a spinoff time travel series, the time police, with the first book just out called doing time.
Start with the first book in the series: The time machine by h g wells Guri and gura by rieko nakagawa, illustrated by yuriko yamawaki, translated by peter howlett and richard mcnamara. At some point the group loses the sister and find her having traveled.