RUMFORD — The Fourth of July celebration Monday will be big. Really big.

Think jumbo bamboozler show, a giant Yahtzee game and more big fireworks shells than last year, according to organizers.

It all takes place at the Hosmer Field Complex starting at 3 p.m., thanks to the efforts of a small group of volunteers with the Fourth of July Committee/Rumford Parks Commission.

Steven Marson, president of Central Maine Pyrotechnics of Hallowell, said his company will make up for the lack of a finale last year, when the manufacturer did not put timers in the fireworks used in the finale. His company realized it too late, he said.

“Every finale string is supposed to have a five-second timer,” Marson said. “That allows every string of 10 shells, with a five-second delay before the next string takes off. Ultimately, those shells in the finale — some 672 shells — all went off in about 40 seconds. All of them — just like that.”

This year, Marson said the company will set off several larger shells to compensate for the 2015 glitch.

Leading up to the show will be lots of activities, food and entertainment for celebrants.

At the start, 49 Franklin’s Scot Grassette will present his jumbo version of bamboozler betting games played at bars. Instead of playing them on a bar or table, they’ll be set up on the field.

“What I’m doing is jumbo bamboozlers,” he said. “So instead of using toothpicks, I’m using two-by-fours. Instead of using cups, I’m using five-gallon buckets. So it’s big, jumbo, outside, family-friendly puzzles. You’ll be able to see it from a helicopter.”

The 30-minute show will have audience participation throughout, with some prizes.

Committee member April McLean said other events include a tough man challenge by the Greater Rumford Community Center, and a dunk tank, with new Rumford Selectman Chris Brennick volunteering to take the last 30 minutes.

She said there will also be a giant Yahtzee game.

There will be “three tries to get a Yahtzee, with the prize being a certificate from Pizza Hut and perhaps a bigger prize for someone getting a Yahtzee of all sixes,” McLean said.

Food will also be offered by vendors.

“We’re going to have root beer floats, strawberry sundaes, cotton candy,” said Parks Superintendent Mike Mills, a member of the Fourth of July Committee.

Dan Richard, chairman of the Rumford Parks Commission and another member of the Fourth of July Committee, said volunteers are still needed during the event and for cleanup afterwards.

“If they could give an hour or two, that would be perfect,” he said.

The schedule of events is:

3 p.m. — Gates open;

3:30-4:30 p.m. — Music by Monsta

3:45 p.m. — Balloon Zoo Show by Scot Grassette

4 p.m. — Baby Carriage/Wagon Parade for children up to third grade

4:30 p.m. — Bike Parade for those up to eighth grade

5 to 8 p.m. — Games and activities

5 p.m. — Bamboozlers Show with Scot Grassette

5:15 to 6:15 p.m. — Music by Standby

6 p.m. — GRCC Gymnastics Competition Team Demo

6:30 p.m. — Family Fun Magic Show with Scot Grassette

7:15-8:15 p.m. — Music by Fat and Jacked

8:15-9:15 p.m. — Music by Troy Allen and the Revival

9:15 p.m. — Fireworks

Rain/wind date — Tuesday, July 5

There will be no glass bottles, smoking, dogs or fireworks, other than sparklers, allowed inside the Hosmer Field Complex.

Freedom Color Run 5K

RUMFORD — Amanda Hamner is organizing the second annual Freedom Color Run 5K on Monday, July 4, at Hosmer Field.

Registration is at 8 a.m.; race starts at 9 a.m.

The kids’ Color Run starting at around 10 a.m. will be a lap around the track.

All profits support the Fourth of July Committee’s fireworks show.

Register at raceentry.com/races/rumfords-freedom-color-run/2016/register.