hi happybilly,
our daughter joined Bookstart in Kowloon Tong when she was 18 mths. We had the same problem when she started, she wouldn't sit down at the begining of EACH lesson and started wondering around the classroom or went direct to the table for drawing. She even cried when I forced her to sit down with the other children. Rachael (the teacher), was really nice and said it was normal for LITTLE ones to behalf like that. Things got better after a few weeks and we haven't any problems since.
At the beginning of each classes, the children will sit on the floor with their parent/helper and we would sing and do movements with arms and legs.
Then the teacher will read a story and interact with the children.
(the teacher will let the children touch the book, use soft toys, hats, make special sounds etc to make the story interesting)
Then depending on the theme, the children will sit on the table and make a craft related to the topic. So the children will have the opportunity to draw, use paint, glue etc. Once they finish, there is time for biscuit & drink (provided by Kids Gallery). If time allows, they will play with toys on inside the classroom. Finally, they will sing the bye bye song, get a sticker and chop on their hand.
Unfortunately after 2 months, Rachael went on holidays so they cancelled the mon classes and Tue was already full. So it was impossible to re-enrol and we joined Artplay instead.
My daughter is still doing Summer classes in Kowloon Tong and love it.
As mentioned by Neha, you could do a trial class and join the course if you're happy with it otherwise just pay for that lesson.
Good luck!