Well, that didn't work

Little Bug is a very savvy cat. In the night after all the other cats were in their Cat House, Dennis set the dog crate trap and we waited for Little Bug to show up. He did go over to the crate to investigate, but then he started to play with the string and sprung the trap. We didn't see him for the rest of the night even though we set the trap and watched on the Cat Cam until about 1 a.m. How did that kitten get so smart?