Your child’s little piggies are so cute you can’t go a minute without nibbling them. (Yeah, it’s a foot fetish. So?)

For the love of those precious pedals, check out the Pitter-Pad iPad app. The so-simple-it’s-genius free download measures infant and toddler shoe sizes with a few easy touches. Just set your iPad in front of your tyke, place her bare foot on the screen, and move a digital line to gauge height and width. Within seconds, her shoe size pops up.

Imagine: no more shopping meltdowns (“But I don’t wanna try it on”) or risky online order guesstimates (return shipping stings, doesn’t it?). Instead, you get a fun way to engage your child and watch her grow.

You’ll be head over heels.

Available online at pitterpad.com.

WATCH
Children’s Theatre-in-the-Woods
What: Puppets, griots, and dinosaurs take center stage during the series of engaging (and affordable) shows.
Why: It’s your solution for keeping ’em entertained all summer.
When: Thru Aug. 13. Tues.-Sat., 10 & 11 a.m.
Where: Wolf Trap, 1551 Trap Rd., Vienna (703-255-1868). Tickets at 877-965-3872 or online at purchase.tickets.com. Adults and children, $8; under 3, free.

EXPLORE
Smithsonian Folklife Festival
What: Learn about the world’s many cultures through crafts, dance, and storytelling at the annual can’t-miss event.
Why: Young globe-trotters fill their bellies with exotic treats.
When: Thurs.-Mon. & July 7-11. Schedule online at festival.si.edu.
Where: The National Mall, 7th St. SW, at Jefferson Dr. SW. For info, call 202-633-1000. Admission is free.

CONSTRUCT
Tinkertoy: Build Your Imagination
What: Marvel at the towering replicas, visit activity stations, and let your imagination wander in the open play area.
Why: Low-tech fun in a high-tech world.
When: Thru Oct. 2.
Where: Port Discovery Children’s Museum, 35 Market Pl., Baltimore (410-727-8120). Adults and children, $14; under 2, free.

Photo: Thinkstock