1 Table of Contents: “...Chapter 15. Internet of Toys and Forms of Play Early Education: A Longitudinal Study...”

2 Table of Contents: “...: reduced filters and a three-dimensional toy model -- 4. Continuous and discrete Fourier series...”

3 “... mainframe computers of 30 years ago for little more than the price of a toy. Today, plastic materials...”

4 “... products, electronic devices, even our children's toys. Many of these chemicals help us live longer...”