When you have young children, there’s always an excuse to celebrate. Went pee-pee in the potty? Call the relatives. Counted to twenty? Ice cream all around.

Get extra mileage out of the mother of all milestones with Half Birthday Party Kits. The packages of paper tableware (with colorful illustrations of half slices of cake and half party hats) and shiny balloons proudly announce that your little reveler has hit the midway mark.

The loot was created by a proud Arizona grandmother and her son, who on their site give ideas on how to throw a bash six months after the big day. (Our favorite tip: Sing only half of the birthday song.)

We love the silliness of it all, especially for kids with b-days in the middle of winter (sorry, stuck inside again), over summer break (shucks, no school party), or smack-dab on another holiday (“Merry Christmas, oh, and happy birthday, Timmy”).

Now everyone can live it up to the fullest.

Available online at halfbirthdayparties.com, $4-$15.

	Surprise! There are more ways to party hearty.

SAVOR
Peach Festival
What: Pony rides, contests, and a presentation by Raptors on Tour.
Why: It’d be a crime not to take home a pie or two.
When: Sat., 10 a.m.-4 p.m.
Where: Linvilla Orchards, 137 W. Knowlton Rd., Media (610-876-7116). Admission is free.

JAM
Kid Fest
What: Princess Katie & Racer Steve put on a show in Abington Art Center’s Sculpture Park, plus crafty activities.
Why: Refreshments from Trolley Car Diner give ’em energy to dance.
When: Thurs. Festival, 5:30-8:30 p.m.; concert, 6:30 p.m.
Where: 515 Meetinghouse Rd., Jenkintown (215-887-4882). Admission is free; activities, $2-$10.

SHAZAM
Magic with Michael Chamberlin
What: Summer boredom disappears.
Why: Lots of audience participation keeps kiddos spellbound.
When: Wed., 10:30 a.m.
Where: Parkway Central Library, Montgomery Auditorium, 1901 Vine St. Info at 215-686-5369. Admission is free.

Photo: Courtesy of Half Birthday Parties