Author Craig Johnson visits the Booth Western Art Museum tomorrow for a conversation and book signing. Johnson writes the New York Times bestselling Longmire mystery series, which inspired the Netflix show. He signs books from 5 to 5:30 p.m. and again after his talk, which begins at 5:30 in the Miller/Rhoden Ballroom. Guests can buy his newest novel, Have Courage, on-site. Registration is free but required, and space is limited. Visit https://boothmuseum.org/ to reserve a spot or find details on this week’s free family night, the 30 at 30 member opening, family holiday ornament-making, and more.

On Saturday, Tellus Science Museum hosts Scoutacular Science from 10 a.m. to 3 p.m. Scouts ages 5 and up rotate through labs, hands-on activities, and live science demonstrations by the Tellus SASSquad. The Blue Crew leads scout-focused gallery challenges, and the observatory opens for solar viewing when weather allows. Registration is required, and space is limited, so sign up on https://tellusmuseum.org/ by Friday at noon. Tellus is also hosting an evening sky watch and a members-only story time this week.

Also on Saturday, the Savoy Automobile Museum presents a Tireside Chat on the Soap Box Derby story from 2 to 3:30 p.m. Dennis VanFossen Jr., president and CEO of the International Soap Box Derby and a 2007 Super Stock Rally World Champion, shares the history, STEM lessons, and stories behind the event. The museum screens the PBS documentary More Than a Race at 1 p.m. beforehand. The talk pairs with the new exhibit Downhill Thrill: Soap Box Derby World Champions, which opened Tuesday. General admission includes the program. Visit https://savoymuseum.org/ for more information on this and this month’s Movies at the Museum showing.