The same children can play the games but in different ways, since the programs are tailored toward the learning styles of each child. This is what makes adaptive learning an essential tool in classrooms as well.
These are basically digital versions (like ebooks) of worksheets that can be bought and downloaded to your computer from the internet or from CDs and then printed out. The advantage is that you can print out whichever sheet you wish. If you need to re-inforce a certain concept more you can usually print out that sheet again. Of course you will therefore need to have a computer and a printer.
Book knowledge is the ability to recognize book formats and purpose. Early readers learn how to hold a book properly, to read English from left to right, how pictures supplement the story, and that books have basic components such as a front and back, spine, pages, covers, and more. Children automatically learn these things at a conceptual level long before they understand the purpose of each component.
Kindergarten worksheets are often of much value in helping kindergarten children learn and re-inforce basic concepts in an interesting way. Small children usually like to do things rather than just read or listen. They also get bored rather easily. Therefore giving them well-designed, illustrated worksheets to do makes it easier and more fun for them to learn. Completing a worksheet also gives a child a great sense of fulfillment. In fact, not just for kindergarten, but even for older learners worksheets can form a valuable part of the learning process.