I believe this 'shock method' works the best for him.
He said firmly 'no' when the principal was about to bring him into his new class. When we were leaving him behind, there was the look in his eyes... the same look like two years ago on his first day of the preschool.
Not smart, but I forgot his jacket and therefore I had to return to the school again. I was nicely surprised how he was already participating.
Just minutes ago I received this message from a mom of one of his Californian friends:

Alex wants to say hello to Maarten and is sending two pictures of the human body that he drew in their anatomy studies. He misses Maarten very much and was sad when I picked him at school on Maarten's last day. We attended William's birthday party yesterday, and his mother said that William cried for four days. It sounds like the classroom misses him and wants to say hello.
Maarten also keeps drawing pictures for his Californian friends and many times I have to spell the names of his ex-class mates (especially his girlfriends!), so that he can write it down correctly.
He obviously doesn't understand the situation yet.
Is it smart to show him Alex's message?




















