There are chess sets, bowling, soccer, even giant toys for playing in the pool. Even giant lawn sized versions of board games, like snakes and ladders and even the one pictured here. They call it "Get Knotted", which is another name for Twister, it seems. Enjoy!
And when they get tired of being outside, they can snuggle up with some more giant toys - really cool jumbo NFL plush toys. These guys are massive! (My dogs would love one, but I'm pretty sure my house would look like snow. Hopefully yours will fare better.)
Disclosure of Material Connection: Some of the links in the post above are affiliate links. This means if you click on the link and purchase the item, I will receive an affiliate commission, probably enough to get a stick of gum. I generally only recommend products or services on this blog that I would use personally and believe you will find cool as well. I am disclosing this in accordance with the Federal Trade Commission’s 16 CFR, Part 255: “Guides Concerning the Use of Endorsements and Testimonials in Advertising.”