"AH MAN, DANICA and that Mouse are back, and this time they brought at a friend." That was my son comment when he soon The Times Machines.
This book is new, so after my son completed Danica's addition and subtraction book, I was forced to try other authors. Unfortunately, they were disappointing, so I taught my son myself without books. He'd learned it, but as he's only in 1st grade, I wanted something to reinforce. I was thankful to see this book. In reviewing it, it does - like her first book - explain concepts and helping kids understand the big picture. It kid friendly, and well done.