Toys. And babies. And their toys.
This picture is actually pretty tame. They boys have only been playing for about 10 minutes. The worst comes at the end of the when all the toys have been strewn across the entire living room and Henry has been Godzilla to the train table (not pictured).
There is usually a solid 15+ minutes dedicated to cleaning up the disaster after they go to bed. If I’m really sneaky, I mask cleaning up into me playing with them before dinner.