MADAWASKA, Maine — Along with sightings of robins, warming weather and longer days, a sure sign of spring in the St. John Valley is the annual Top O’ Maine Trade Show.

More than 70 vendors and displays are expected for this year’s event slated for Saturday and Sunday, April 25 and 26, at the Madawaska Multipurpose Center.

Doors will be open from 9 a.m. to 8 p.m. Saturday and from 10 a.m. to 4 p.m. Sunday. Admission is $3 for adults, $2 for children 12 and under.

“It’s shaping up really well,” said Steve Hughes, executive director of the Greater Madawaska Area Chamber of Commerce. “It’s going to be a great weekend.”

The theme for the 20th show is “The Top O’ Maine Goes Green,” and Hughes said it’s a perfect fit given local and global current events.

“Everyone is really concerned about the economy and ways particular individuals can improve things,” he said. “One way is to conserve and that, in turn, will help save money.”

Hughes said green-oriented vendors include businesses and groups exhibiting home improvement products, alternative energy ideas, do-it-yourself projects, energy conservation ideas and alternative heating systems.

In addition, the Madawaska Chamber of Commerce will have a fun house for children.

“There really is something for the whole family,” Hughes said. “There’s also going to be plenty of food for everyone. It’s a great weekend to be in Madawaska.”