There is a rising importance of human capital in the total capital stock of an economy. In this paper we discuss the nature of investments in children and sketch out the diverse kinds of inputs to the developmental process across different countries at selected time points. The observable inputs are time and goods and they can arise both in the home and in formal care settings. Estimates are given for Sweden and the U.S. The mere size of the total of these investments in early human capital, more than 20 percent of GDP for Sweden, raises a number of interesting questions.