Fun Things To Do in Orange County! 📍Adventure Playground, Irvine We're here at Adventure Playground and this is place is awesome! Free admission, free parking lot and street parking. There's a fun tree house jungle gym, extra large legos, slides, climbing walls and natural play areas. A foosball table, large chess set. Fun for all ages! Pack water, snacks and a picnic lunch. Tips: public restrooms, changing tables, shaded grass areas, picnic tables, no pets. Bonus: it's next to the University C