I've written a round up of bottle top play and learning ideas and have included this awesome post. (theimaginationtree.com)
We then asked our families — through newsletters, emails and group discussions with the children — to start saving their plastic bottle tops and lids for us. (kidsmatter.edu.au)
The team even offers free presentations to pupils about recycling to explain the production process involved in turning old milk bottle tops into their new play trail. (qaeducation.co.uk)