Book 26, Question 131
How can you invent with materials from the recycling bin?
Boxes, cardboard tubes, bottle caps, jars, and egg cartons make great invention materials.
Using them saves money and keeps stuff out of the trash. Look at each item and ask what it can do: a tube can roll things, a lid can spin, a box can hold. Always clean items and ask a grown-up to cut anything sharp or tough.