In the mid-1970s, educational consultant and early childhood specialist Walter Drew created a construction toy he called "Dr. Drew's Discovery Blocks." Based on educational theories promoted in the early 20th century by Friedrich Froebel, Drew refined the concept of building blocks to better suit preschoolers and to promote creative play. Discovery Blocks are smaller than many standard building blocks, the better to fit in young children's hands. Made of unvarnished hardwood, each individual block is identical to the others, eliminating the competitive play that blocks with colors and shapes sometimes can promote. Chosen as Best Toy of the Year in 1982 by the Parent's Choice Foundation, Dr. Drew's Discovery Blocks received a Classic Toy deisgnation from Dr. Toy in 2005.