A fantastic idea for encouraging curiosity and asking W? (why? what if? etc) Questions…
When we first shared this idea on Facebook 2 years ago, a few teachers said that these bottles also worked well for their children with autism.
Stuck for bottle ideas? Fear not, this website has a whole list of different science bottles you can create.
My only piece of advice would be to seal your bottles! I’d use glue if possible as layers of tape can be broken by the determined ones, resulting in a lot of mess!.