Leo's Leikkimaa Lahti is an indoor playground in the Ala-Okeroinen district, where children can play on varied equipment in a covered, safe environment. The park features bouncy castles, slides, ball pits, climbing structures, trampolines and dedicated areas for younger children. It is best suited to ages 1–10, with a calmer zone reserved for toddlers. A café next to the play area lets parents take a break. Grip socks are included with admission. The southern Lahti location next to Highway 12 and free parking make the venue easy to reach by car from further afield.