The brachiation ladder is wonderful.  My son started on it at 2 1/2 yrs old.  He just turned 4 yrs old and the strength he developed just from the brachiator is amazing.  I have all the Doman material including the booklet on brachiation, the How To Make Your Child Physically Superb Book, all the Doman Books, Bit Cards, lecture material from the first parents class through the graduate courses, DVDs, CDs, and many booklets from the Evan Thomas Institute for more educational topics.  Also have Pim Spanish. Pim Japanese, Whistlefritz, Tweedlewink, etc. Please feel free to contact me if you are interested in any of this.  I will gladly answer any of your questions.  [email protected]