Finding activities to keep them busy all year can be like searching for lost booty.Well, X marks the spot with the Hike the Highlands Scavenger Hunt. It’s an interactive way to enjoy the great outdoors.Download the questions or pick up a set of cards at locations around the city. Not to worry if your cub gets pooped easily; most of the answers can be found toward the beginning of the trails.Trek to at least three parks (just out of town is the Schuylkill River Trail, or take a trip to the Hopewell Furnace National Historic Site for apple picking) then submit your answers online. You’ll be eligible to win outdoorsy prizes in monthly drawings.Plus, at each spot there’s changing leaves and oodles of fresh air.Which is something everyone will treasure.Hike the Highlands (610-868-6906 or outdoors.org). Through October 31.Photo: Tom GettingsSCOREVideo Games Live What: Hear music from favorites like Zelda and Tetris accompanied by a light show, or just drop by for the free festival with costume contests and guest appearances.Why: En-joystick. When: Sun. Festival, 1:30 & 6 p.m.; show, 3 & 7:30 p.m.Where: Kimmel Center, 300 S. Broad St. Tickets at 215-893-1999 or tickets.kimmelcenter.org.CONSTRUCTMini Model Build What: Lil’ blockheads (ages 6-14) learn to put together a tiny pumpkin and take it home for free.Why: Assembly line.When: Tues., 5-7 p.m. Get there early, supplies go fast. Where: The Lego Store, King of Prussia Mall, 160 N. Gulph Rd., King of Prussia (610-337-3203).SAVEOne Fish Two Fish Old Fish New FishWhat: Scoop up bargains on clothing, gear, and toys at this brand new consignment shop.Why: Tag sale.When: Tues.-Sat., 10 a.m.-6 p.m.Where: 741 S. Fourth St. (215-687-7356).