About a week after chelation (weve done 2 cycles) my son gets happy and we see some small changes. He is babbling new sounds and is babbling a lot- this from a kid who used to be almost silent. His eye contact is a little better and he is playing with toys more appropriately. He can actually entertain himself with a toy for a long time--without a Thomas video on! I dont know if this is a developmental step or changes from chelation. I just hope it continues.