Paul and Marie Celebrate a Birthday

Paul and Marie are little explorers and best friends. They are curious about everything: why does the sun set in the evening? Why does a chameleon change its color? How and why do animals camouflage themselves? What are geometric shapes? And much more.
The colorful book "Paul and Marie Celebrate a Birthday," released in the "First Book of Knowledge" series, will awaken the interest in mathematics in curious little ones, provide basic knowledge about geometric shapes and counting, and also tell how to conduct simple and interesting experiments and make a puzzle with their own hands.