Are there any freely-available tools to count how many moving objects are in a video clip? That's a 5-second sample, and I can make a clip of any length, but in this particular case I'm not concerned ...

Psychologists have found that use of certain objects for counting have mixed results with preschoolers, particularly if those objects are rich in perceptual detail (bright and shiny). Concrete objects ...

In pre-kindergarten, children ages 3-5 develop a basic understanding of numbers and counting, and connect both to the idea of “how many.” Pre-k math tips work on recognizing, grouping, and comparing ...