Having read all the Tuttle Twins books I can honestly say how great they are and how helpful they have been in educating my children on key principles that are foundational to how things should work. Please do not read or believe the negative reviews of these books - they clearly are not reading them, just posting negative reviews. Get the books and read them for yourselves. You will easily see that what is being taught and demonstrated is of excellent value. Teaches us to have personal responsibility for our actions and not rely on others and the government to do things for us, hmmm what a concept.
Great work Tuttle Twins - keep it up.