The building at Ashdene Care Home, in Eastgate, is used by residents for visits from loved ones.
Youngsters are being invited to draw or paint a picture for the space. Currently, the walls are blank.
The competition entries will be judged by residents and relatives across three age groups.
These are: two-five-years-old, six-10-years-old, and 11-years-old and onwards.
Entrants are asked to put their name and age at the bottom of their picture, plus a contact number on the back of the paper.
Those chose as winners will receive a certificate and a prize.
Entries can be posted to Ashdene Care Home, 89 Eastgate, Sleaford NG34 7EE, or delivered there by hand.