Use tension rods and a sheet to make a tent in the hallway for the kids. You can decorate the sheet with fabric paint or markers. And can be easily stored when done. this is awesome - Click image to find more DIY & Crafts Pinterest pins
design and make one of these. walk without falling every 4th step, this will be the best thing you will own when he's visiting.. he'll happily sit and play under your table for hours. and his "table house" will be something you can use as a reward for good behavior.