This contact sensor alarm can help to deter the intruder, wake or alert you if at home and possibly alert eighbors.  1.  Compact, magnetically triggered alarm sounds when window or door is opened  2. Multi-purpose - includes entry chime setting that alerts you when people or children are coming & g...

Engaging account of why seeds travel and how they do it. Learn how some seeds fly, others float, and still others are shot away. Then find out two ways in which animals play a role in seed dispersal. Numerous black and white illustrations complement the text. Suitable for ages 8 and up.