Today I received an email from Spass-mit-Hund. The email, and the accompanying flyer, were in German, which is always a little problematic, given that it's more than twenty years since I studied German - okay, I'll admit it is a LOT more than twenty years!
(But the link I've added above is in English, if you click on the picture of the British flag.)
Here's a link to the first page of the flyer, with two pictures of games that look to be fun and cheap. I'm going to try to make the one with the upside-down stool and the plastic pipe. I also think the other game looks like fun, the one where you get a muffin-baking-tray and hide treats under a variety of objects, such as tennis balls and balls of crinkled-up newspaper. (Just click the flyer up to 400% size to get a good look at the pictures.)