Last year, Todd Giatrelis’s 11-year-old daughter celebrated her birthday with friends at Sugar Plum Parties in Stoneham.

Sarah Towne, a family friend and Giatrelis’s business partner, attended.

“We thought it was a great concept,’’ said Towne of the all-inclusive birthday party venue for young girls.

As it turned out, the owner had been looking to sell.

Giatrelis, Towne, and a third partner, Ashley Shimabukuro, bought Sugar Plum Parties in July 2015.

Previously, they had started Flip Flop Shops, a retail chain selling casual footwear, sunglasses, and other summer items, which grew to more than 90 franchises worldwide. They sold that business in October 2015.

“We were looking for the next thing and we thought [Sugar Plum Parties] was it,’’ said Giatrelis. They operate the store in Stoneham, and began franchising efforts this year.

We spoke with Giatrelis, 51, of Belmont, and Towne, 35, of Arlington.

Q. Party girls?

Giatrelis. 3 to 13 are the main ages.

Q. Offerings?

Towne.There are 12 themed parties [including The Diva Party, The Pink Poodle Party, The Spa Party, The Mermaid Party, and more] All include costume dress-up, hair and nails, themed activities, food, and a stage area with a disco ball, bubble machine, microphones, and age-appropriate music for singing and dancing.

We do everything from invitations to thank you notes.

Q. Length?

Towne.Depending on the package, parties can be one-and-half hours [up to five girls] to two hours [up to 10 girls].

Q. Cost of parties ?

Towne. Two price packages, $349 and $549.

Q. Days?

Towne.Parties can be accommodated seven days a week. We also have drop-in days [$15] when parents can bring in their children for an hour and a half and [the girls] can have their hair and nails done and do karaoke.

Q. Franchises?

Towne.It’s a turn-key for people who may not have as much business experience. We help with everything.

Giatrelis. It’s a commitment of about $100,000. And, we love the business model.

Q. Bottom line?

Giatrelis. What’s better than birthday parties for kids ? They love being treated special. And the parents don’t have to worry about entertainment or cleanup. They can just enjoy the party.

Wendy Killeen can be reached at wdkilleen@gmail.com.