
It is hard for kids to imagine that everything they see and use was once invented by someone. From computer games to ball point pens, Teddy bears to drinking straws, I Wonder Why Zippers Have Teeth clues kids into the behind-the-scenes people and stories behind many objects they...

It is hard for kids to imagine that everything they see and use was once invented by someone. From computer games to ball point pens, Teddy bears to drinking straws, I "Wonder Why Zippers Have Teeth" clues kids into the behind-the-scenes people and stories behind many objects...

"What did people use before they had refrigerators?" and "Where do inventors get their ideas?" are some of the questions answered in this intriguing look at inventions.




I Wonder Why series.

![Me pregunto por qué: Las cremalleras tienen die... [Spanish] 8424119614 Book Cover](https://m.media-amazon.com/images/I/61piyv65KVL._SL500_.jpg)

"What did people use before they had refrigerators?" and "Where do inventors get their ideas?" are some of the questions answered in this intriguing look at inventions.

