Scientists suppose that lack of physical development of children of primary school and preschool children is closely linked with use of baby walkers in infancy.

Watching development of 700 children, researchers found that different tools, such as jumpers, walkers and other, only hinder physical development of children. Kids are deprived of an important stage in their development - crawling.

And as a result of: violation of coordination, balance and natural motion activity, and in a later period - development of violation of letter and small motor. Many of children come to school, even not knowing whether they should write with left or right hand.

There is nothing terrible in using such means from time to time, scientists believe. But these devices are unsuitable for long-term use and should not replace functions of parents.