Big Max, the RE/MAX hot air balloon, will return to the Cambridge Common for Oktoberfest to provide tethered balloon rides, weather permitting, on Sunday from 3 p.m. to 6 p.m.

RE/MAX of New England and RE/MAX Destiny will also have a booth in Harvard Square where Oktoberfest participants are invited to drop off old cell phones, which will be donated to Cell Phones for Soldiers.

Donations from the balloon rides will benefit two local charities: Our Place, homeless children’s center in Cambridge, and Cambridge Housing Assistance Fund (CHAF), a public/private partnership that brings local Realtors, banks, businesses and individuals together to raise funds to assist with rental housing for homeless families.

"It is truly impressive and exciting to see Big Max in contrast to the surrounding buildings. This 7-story hot air balloon, piloted by Chris Mooney, thrilled young and old alike at last year’s Oktoberfest," said RE/MAX Destiny Broker/Owner Paul Turcotte. "We can only hope the weather will be half as nice."