Well, first as everyone said not enough glue. But that’s not even the problem here, we can’t even assemble the birdhouse due to the holes not being cut properly. My tube of glue was 100% dried out and I was unable to use it, had to use some of my boyfriends but there was most definitely not enough for two people, which I didn’t expect there to be. Highly recommend just getting an unpainted bird house and just buying paint and brushes. Only one teeny tiny brush and not enough paint the whole bird houses, luckily I had a few and some extra paint on standby anyway. Don’t really recommend this... at all.