It’s true: Baby’s got back. But all that sweet cushion doesn’t mean she’s comfy having her diaper changed on any old pad.

Before she hits rock bottom, try the Küster Jelly Baby memory-foam changing mat. Ergonomically shaped to fit your bumpkin’s bod, the squishy, curved pad comes in cream, pink, or blue and is made from material that warms to the touch.

On the go? A travel bag is included. Afraid of a mess? Opt for a machine-washable cotton liner for extra coverage.

Don’t worry, they’ve got your back, too.

Available at Baby Furniture Warehouse Store, 1 General Way, Reading (781-942-7978 or babyfurniturewarehouse.com). To see styles, go to kuster-usa.com.

CONJURE
Wizards of Discovery: a Science of Harry Potter Festival
What: Mix a potion that foams, changes color, or even disappears.
Why: Abracadabra.
When: Sat., 10 a.m.-3 p.m.
Where: The Discovery Museums, Science Discovery Museum, 177 Main St., Acton (978-264-4200).

MAKE
Art & Nature Jr.
What: Kids create masterpieces inspired by the world around them.
Why: Mother Nature meets Picasso.
When: Sat., 1-3 p.m.
Where: Boston Nature Center, 500 Walk Hill St., Mattapan. Register at 617-983-8500.

JUMP
Leap into Spring
What: Celebrate the season with froggy fun and games while learning about amphibians.
Why: Put some spring in their step.
When: Sun. Ages 3-4, 10:30-11:15 a.m.; ages 8-10, 1-2 p.m.
Where: Franklin Park Zoo, 1 Franklin Park Rd., Dorchester (617-541-5466).