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.

SPLASH
The Boston Common Frog Pond
What: The oasis kicks off the season with treats from Boston Frosty, a site-specific performance by Anikai Dance, and artsy activities with Sidewalk Sam.
Why: The wading pool is your tadpole’s favorite place to cool off.
When: Opening day celebration, Wed., 11 a.m.-1 p.m. Hours thereafter, daily, 11 a.m.-6 p.m.
Where: 84 Beacon St. (617-635-2120). Admission is free.

EXPLORE
Toddler Tales
What: Snacks and crafts for little animal lovers (ages 3-5).
Why: Save time to visit the Buttonwood Park Zoo’s critters afterward.
When: Ongoing. Thurs., 10:30 a.m.
Where: 425 Hawthorn St., New Bedford (508-991-6178). Zoo admission: adults, $6; children 12 and up, $4.50; children ages 3-11, $3; under 3, free.

LEARN
Soar with Reading
What: Meet characters from PBS Kids and hear JetBlue crew members read stories.
Why: Hooper, the talking guinea pig, encourages your tot’s love of books.
When: Tues., 11 a.m.
Where: Central Library in Copley Square, Rabb Lecture Hall, 700 Boylston St. (617-536-5400). Admission is free.

Photo: Thinkstock