So glad you posted. It's a really good first chapter. You have a lively, imaginative, engaging style. You have smart, funny, sharp ways of saying things. I like the evocation of the summer, term about to end - brings it all back. Great to see a mention of a space hopper! Oh, and 10 inches!!
Seriously, you're a fine writer, a real eye for detail and real sense of voice. You've sketched everything nicely for a first chapter. Interesting now to see where this will go. Thanks for posting. An enjoyable read for sure.