And if you missed the weekend's activities celebrating the globe, there's still time to get in on the action this week.

And if you missed the weekend's activities celebrating the globe, there's still time to get in on the action this week.

From 10 a.m. to 2 p.m. today, the Southern Oregon University student group ECOS plans an Earth Day celebration at the university's Stevenson Union, 1250 Siskiyou Blvd., Ashland.

It will include free smoothies made from a bicycle blender powered by faculty and students, a tie dye t-shirt coloring station, tabling from the area’s environmental community to provide green awareness, kiddie bicycle races and music.

At 7:30 tonight at Bloomsbury Books, 290 E. Main St., Ashland, John Javna talks about his updated book, "50 Simple Things you Can Do to Save the Earth."

Javna, also behind the popular "Uncle John's Bathroom Reader" books, wrote the first version of "50 Simple Things" in 1989 but now says it didn't go far enough.

The new book focuses on things people can do, by collaborating with others, to counteract 50 crises that have attacked what he calls the planet's life support system.

The talk tonight is free and open to the public.

Earth Day stragglers can get in one more activity on Wednesday, when Medford's Kids' Imagination Discovery Space plans a daylong Earth Day celebration.

The play space at 226 N. Ross Lane will have stations set up where kids can experiment, learn about keeping the Earth healthy and make recycled art.

The activities are free after museum admission, which is $5 per child and $2 for adults.

Details: 772-9922.