4:01am PDT - April 15th, 2022

Today marks #NationalRubberEraserDay! Tablets of rubber (or wax) were used to erase lead or charcoal marks from paper before there were rubber erasers. Another option for the eraser was crust-less bread. #STEAM https://t.co/hBFPykE5ee

0 retweets   0 likes  - STEAM Centre (@steameducentres)