All blocks are not equal
Take the time to choose the best. Poorly made blocks are frustrating for children to build with. Be sure your sets of smaller blocks matches your medium or large ones in terms of dimensions and proportions. In other words, make sure they are modular.

Block building: Opportunities for learning
Harriet K. Cuffaro

What learning opportunities are you offering the children in your setting? Do you have open ended activities? Blocks are perfect.

Block play, math and literacy
Pamela C. Phelps, Ph.D. and Laura L. Stannard, Ph.D

It’s been more than two hundred years since Friedrich Froebel introduced wooden shapes for children to explore, take apart, and put together. Since then, blocks have been shown to aid the development of young children.

Building blocks? Brilliant!
MaryBeth Withers

Block play opens a doorway to discovery of math, technology, engineering, design and even architecture.

Setting up the block area
Mary Hohmann and David P. Weikart

Almost all children enjoy playing in the block area and can find something to do with blocks, whether or not they have ever played with them before.