Everybody's paying homage to nature this week since, after all, Earth Day is Tuesday.

The Children's Museum of Southeastern Connecticut in Niantic is focusing its school vacation program on the theme of "Back to Nature" from 8:30 a.m. to noon today and Friday. (That is $30, $40 nonmembers, for a single day.) On Tuesday, the museum hosts "Reduce, Reuse, Recycle!" Kids can whip up artistic creations out of recycled material from 1 to 2:30 p.m. Museum admission is $7 per person ages 1 and up.

The Mashantucket Pequot Museum, meanwhile, offers Earth Week festivities from Wednesday, April 23, through April 26. Each day, between 11 a.m. and 3 p.m., visitors can watch movies about the natural world, visit a giant robotic bug exhibit, make artwork, and add their own flourish to a Protect the Earth mural. Museum admission is $20 for ages 19-54; $15 for ages 55 and up and for college students; $12 ages 6-18; and free for kids under 6.

Mystic Aquarium is continuing its Eco Splash celebration through Tuesday. That ranges from seeing rehabilitated raptors to going on a scavenger hunt, which will include the chance to plant something to take home and grow. It's held 10 a.m.-3 p.m. through Tuesday, and it's free with aquarium admission - which is $29.95 adults, $26.95 ages 60 and up, $25.95 ages 13-17, $21.95 ages 3-12, free for kids 2 and under and for members. Call (860) 572-5955.

Libraries are marking Earth Day, too. At the Old Lyme-Phoebe Griffin Noyes, children can help create a garden scene from recyclables at 4 p.m. Tuesday. At the Stonington Free Library, the Earth Day activities - with the chance to design something out of recycled materials - run from Monday, April 21, through Friday, April 25.

- KRISTINA DORSEY