Paint by numbers kits for adults have made a comeback. Most come with all you need, but here's a list of my few essential supplies for the best result
Springtime Paint-by-Number Kit Paint By Number for Adults
Make Your Own Paint-By-Numbers - A Beautiful Mess
Paint By Numbers For Adults - Exquisitely Unremarkable
Springtime Paint-by-Number Kit Paint By Number for Adults
Paint-By-Numbers: A New Addiction for Crafters Everywhere! – Altenew
Springtime Paint-by-Number Kit Paint By Number for Adults
Craft-Ease Paint By Numbers - Surrealist
Paint By Numbers For Adults - Exquisitely Unremarkable
Remaking Our Modern House Number Sign - Modern on Monticello
Frameless Paint by Numbers Painting Kit Canvas Art Acrylic Amalfi