If they have claws and are out during the day, they are likely baby iguanas. If they have toes that are round pads and are out at night, they are geckos.
Iguanas use their claws to climb trees, where they spend most of their time. We see geckos in the evening. Often a small gecko will climb the outside wall of the condo building and hang upside down on the ceiling of our balcony. The round pads for toes are not suction devices. They have tiny hooks under the pads that enable them to hang upside down.
On our travel photo site, Viva la Voyage, we are showing some photos of what we think is the world's most artistic and impressive cemetery, Recoleta, in Buenos Aires, Argentina. Come to the website for a visit.