Hey Ula guidesRome travel guidesHomeGuidesEuropeItalyRomeExplora, Bioparco in Villa Borghese and free under-18 entry at the Colosseum.Family travelRome · With kidsRome with kids: things to doATAC under-10 travel, Explora session prices, Bioparco desk rates, free Colosseum tickets under 18, and Luneur versus Technotown.