04Please Touch Museum · Philadelphia Zoo · Fairmount Park
Day 4 is the pressure valve: pure play, no founding fathers. Start at the Please Touch Museum (4231 Avenue of the Republic, in Fairmount Park's Memorial Hall) — the children's museum where touching is the point. Admission runs about $19–20 for ages 1+ (under 1 free); hours are typically Mon–Sat 9–5, Sun 11–5, but verify on the official site before you go. The hits: the vintage carousel, the giant play grocery store, the Alice in Wonderland maze, and the Rocket Room. Plan 2–3 hours; toddlers get their own zones.
Afternoon: the Zoo
Drive or rideshare 10 minutes to the Philadelphia Zoo — America's first zoo, chartered 1859, opened July 1, 1874. Admission is roughly $23–29 adult / $19–24 child (dynamic pricing — check philadelphiazoo.org), hours 9:30–5 Mar–Oct, parking $16. The signature is Zoo360 — overhead trails where tigers, lemurs, and orangutans roam above your head. Don't miss Big Cat Falls, the McNeil Avian Center, and the 2026-only Philly Zoo Pherris Wheel for the skyline view. You can bring your own food for the picnic areas.
Evening: early night
Two big attractions is a full day — order in and rest legs for the Parkway tomorrow. If everyone's still going, Spruce Street Harbor Park (seasonal, Penn's Landing) does hammocks and floating gardens at sunset.
Where to stay
Same Old City base. Fairmount Park is a 10-minute drive or rideshare — or the Philly PHLASH bus loops the attractions in season.
Bad-weather plan
Please Touch is entirely indoors — flip the order and do the Zoo first on the clear morning, museum after lunch when storms roll in.
Please Touch: ~$19–20, verify hours · Zoo: ~$23–29 adult, 9:30–5, parking $16 · Both in Fairmount Park — one parking move
Order rule: Museum in the morning (it opens at 9), zoo after lunch — the animals are most active in the cooler late afternoon, and the carousel line is shortest at opening.