- Irwin Gratz, Maine Public Broadcasting Network's local host of NPR’s Morning Edition;
- Portland Mayor Nick Mavodones; and
- State Representative Herb Adams.
There will also be craft activities, prizes, cake, and a birthday card for Henry for everyone to sign.
The party is free and open to the public. It will be held on February 27 from 10am to 12pm at the Maine Historical Society in Portland.