The books are very engaging for kids and the concepts are explained in simple language.



The characters and practical examples make it more interesting.

The books are wonderful. I found them after my son started bringing them home from the school library. The customer service... iffy. Got a call about my purchase, called back, never received a call in return. Had to follow up to see if they were shipped and never received a shipping number.

My son is 7yrs and loves science. The contents are as deep as college, but very easy understanding story. My son reads every noght. Just wish the papers have better quality. Little thin though. I think my money spending on these collection is very well gone.