Home Task 4: Digital Systems Task 4- Option 3 By Kimberley. Published on March 21, 2020. March 21, 2020 0 This seesaw activity allows students to move labels to identify whether the picture is of a past or present technology. Share this:TwitterFacebookLike this:Like Loading... + There are no comments Add yours Cancel replyYou must be logged in to post a comment. This site uses Akismet to reduce spam. Learn how your comment data is processed.