Once again, a large teeter-totter has appeared on Welch Avenue.

For the last nine years the women of Alpha Phi Sorority have paired up with the men of Phi Delta Theta Fraternity to Teeter-tot for Heart. The day-through-night teetering began Tuesday at 2 p.m. and will cease today at 2 p.m.

Each participant will see-saw for a one-hour shift. The teeter-totter is set up in the Phi Delta Theta’s lawn at 325 Welch Ave.

The Alpha Phi women mailed alumni, friends, family and companies to ask for donations for the event. The money raised will be given to the Alpha Phi Foundation. Officials will then donate the money to the American Heart Association and various cardiac care projects around the country.

“All the Alpha Phi chapters do something different for this, but it all goes to the same cause,” said Amy Bick, Alpha Phi’s vice president for programming.

Bick said last year organizers raised $1,500 for the foundation. “We are hoping to raise around $2,000 this year, but we don’t have the final count because all of the money hasn’t come in yet.”

A bucket also is set in front of the teeter-totter for passers-by to donate their change. Bick said as she was teeter-tottering, people would smile as they went by and several stopped to drop change in the bucket.

Susan Morrison is the philanthropy co-chairwoman for Alpha Phi. She said she is looking forward to doing her shift of teeter-tottering even though at last year’s event she fell off the teeter-totter.

“The guys were tossing water balloons out the windows, and I knew one of them. He threw a balloon at me and I fell off,” Morrison said.

This year no water balloons can be thrown, she said.

Wes Gray, Phi Delta Theta philanthropy co-chairman, said this year organizers had to fix the teeter-totter for “comfort reasons.” They added a chair back to each end.

“It was fun. You can lay back in the chair and relax. … It’s kind of nice,” he said.