While trying to cross a moat, Archimedes the Goat and Skinny the Hen learn why objects sink or float.

It can be surprising which objects float and which don't. An apple floats, but a ball of aluminum foil does not. If that same ball of foil is shaped into a boat, it floats! Why? And how is it possible that a huge ship made of steel can float? Answering these questions about density and flotation is David A. Adler's clear, concise text, paired with Anna Raff's delightful illustrations. Activities that demonstrate the properties of flotation are included.

Introduces the concepts of floating and sinking by following a fictional captain on the high seas who wonders why his boat floats and his treasure sinks.

Besides the sea, on Mr Peffer's place, there lived a cow, a donkey, a sheep, a pig, and a tiny little mouse. One warm sunny morning for no particular reason, they decided to go for a row in the bay . . .

Two pocket-size pets meet and get into a tussle when Pug insists that Pig is a pudgy pug, and again when Pig calls Pug a muddy pig.

Three tiny ducks. One straight line.New happy flock. All feeling fine. Until, that is, the last ducking sinks when she should swim. Let's try that again . . . and again and again. All this sinking is ruining the rhyme! Little ones will love following the antics of these adorable ducklings, and parents will enjoy the way the book goes off the rails halfway through. Everyone will laugh at the tiny ducky's string of failures and cheer when it comes up with the best solution of all.

For more than a century before airplanes, people explored the sky in balloons. From 1783 to the early 1900s, aeronauts flew into storms, crossed large bodies of water, sailed over enemy armies, and soared to deadly altitudes. Illustrated in full color with dramatuc period artwork, Sky Sailors by David L. Bristow presents the stories of the pioneers of human flight, such as daredevil Sophie Blanchard from Napoleon's France, and Salomon Andree, who lead an aerial assault on the North Pole in 1897.