touch problem: good question needs good answer

[Guest guest]

i have a 4 year son and he is PDD. we are using ABAtherapy to rehabilitation but

during this 4 resent monthes he likes to touch every thing specially

plastic things and edge of them with his hand and finger.when i take him out of

house he lies down on sidewalk and touches asphalt , in park he touches lawn and

green grass.

also in house he likes to beat cards of fruits and animals to his lips and

around it.

therefore we cant have any rehabilitation programs.