Walmart has Crayola Air Marker Sprayer Airbrush Kit w/ Washable Markers on sale for $6.96. Shipping is free w/ Walmart+ (15 day free trial) or on orders of $35+.
Thanks to community member l_r_r for finding this deal.
This easy-to-use sprayer converts ordinary markers into a vivid spray of ink. 5 Pip-Squeaks Washable Markers, 2 Stencil Sheets and 10 sheets of paper.
Kids can use the sprayer to create their own patterns or pair it with the included stencils for precise themed designs. Thanks to its motorized, electric-powered design, the sprayer provides hours of uninterrupted fun--no batteries required.