Distributed Sensor Networks

This is a coin collector’s dream folder! Not only does it have a space for every state’s quarter—arranged according to year—but now it has slots for the six brand-new quarters that the United States Mint is issuing. These latest coins will honor the District of Columbia, along with five U.S. territories: the Commonwealth of Puerto Rico, Guam, American Samoa, the U.S. Virgin Islands, and the Commonwealth of the Northern Mariana Islands. Not only will this handy folder help collectors hold on to these special keepsakes, but it includes a description of the Commemorative Coin Program; the new District of Columbia, and five U.S. territories programs; a history of the United States Quarter Dollar; details on how the designs were chosen; and an account of how coins are manufactured by the Mint and distributed by the Federal Reserve Bank.

9781474992145 Tree of Life (300片拼圖+16頁小書)A beautiful Tree of Life Jigsaw Puzzle accompanied by a 16pp book that explores the whole tree of life from microscopic bacteria to whole rainforest ecosystems, packed with information about how life works, what makes a living thing, and all sorts of the Earth’s amazing plants and animals.300片拼圖+16頁小書拼圖完成尺寸59*40公分9781839941191 The Tree Book (硬頁書)(英國版)Have you ever thought about all the amazing things that trees can do? How do they grow and why do they change through the seasons? How do trees help us and how can we help trees? Children will love discovering the answers with amazing see-through pages and clear, friendly text. With labelled acetate diagrams of a tree throughout the year, alongside minibeasts and animals that live in trees, this is a fantastic first look at nature for curious children everywhere.From leaves changing colour to underground root networks, The Tree Book is an exciting way to explore all the amazing things tree

A latest installment in the science- and math-based board book series provides a colorful, simple introduction to the study of how the creation of machines and computing systems is inspired by the net

This delightful Halloween board book with a touch-and-feel element on every spread will become a holiday favorite, when preschoolers follow the misadventures of Sebastian, Doc’s motion-sensor ghost th