Hello! I am Maria and I live in Singapore. I have just purchased the parent kit and started with the Horn #1 and have not seen any major problem so far. I am concerned about the Straw #1. When I started my son (he has some speech and language delay), he seemed to stop learning how to drink with a straw. Well, he could use a normal staw before - but with biting, but when he uses the Straw #1, he tries to bite and no longer sips - when he was able to bite and sip on normal straws before. Do you think I must start with a pre-requisite tool before Straw #1? I am helping him straw with the support of my hand but to no avail.
Sometimes changing the straw texture can be difficult if they've been using a motor plan for one that can not transition to another. My suggestion would be to use the Honey Bear with straw that has a flexible tubing that is firm but not completely stiff. It is designed so that if he cannot initiate the suck easily, you can squeeze the cup and help him learn the motor plan without biting. Providing jaw support can help. Once he is independent on the Honey Bear with Straw, you can again transition to Straw #1.
Your local TalkTools distributor may be able to help you find a local therapist with TalkTools training who can better assess and monitor your son's therapy.
I hope this helps!