Dr. Nielsen invested a great deal of time researching and refining the designs for her "perceptualizing aids" or the equipment associated with her Active Learning instructional approach. For this reason we strongly recommend that you purchase only authenic Active Learning Equipment. The authorized dealer in the United States is LilliWorks at

A perceptual aid is an educational instrument designed to encourage level appropriate learner interaction and development.  It should:

Adult's Role

To fulfill a learner's special needs the adult must:

Design Principles of Active Learning Equipment

The basic principles involved in designing the Active Learning environments are:

  1. Feedback: The environment must supply strong responses in multiple modes (auditory, tactile, gustatory, old factory, visual, vestibular).
  2. Support: The child must be supported appropriately in all positions (supine, prone, sitting, standing).
  3. Richness: Related to feedback, the environment must be filled with objects so that minor actions are rewarded with feedback.
  4. Variety: However rich and responsive the environment is, it must be changed periodically in accordance with and to promote developmental changes.

To learn more about the purpose and use of each of these items you may also want to view Dr. Nielsen "R" Video-Perceptualizing Aids: How, Why and When DVD which is available through LilliWorks.