I personally like making games and toys, one of the favourites with my dogs and fosters has always been filling a small cardboard box with toilet roll tubes (like below) and putting treats or kibble under a couple.
You can make it harder by folding over the ends and rubbing different rolls in strongly scented things too, to help disguise the treat scent.
If you google DIY doy toys or games there are loads of ideas, and its a great way of getting DC involved pre-puppy
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Plastic coffee jar lids (the hard plastic round ones, about the same diameter as a mug, cleaned and made sure they are safe/appropriate for your size of dog) are also good as they slide across the floor like hockey pucks.
PolePup loves having five or so at a time to chase after, and as its an easy game to pick up, even the most severely abused of my fosters all loved it, and it was a great gateway game for them to learn other games.
If your dog is food motivated you can put a smear of peanut butter (dog safe stuff) underneath for added fun. You do have to watch them carefully and make sure you take away any which are getting cracked or chewed as they can become sharp.
We have solid wood varnished floors throughout the whole house so the coffee lids slide around brilliantly, but perhaps not so good if you are worried about your floors scratching, thought its not something I am fussed about personally.
Not all dogs are food motivated or interested in food based games, PolePup and PoleDog both ignore kongs, regardless of the filling. Our cats on the other hand greatly appreciate their disinterest
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PolePup absolutely lives for praise and cuddles, and he loves things he has to work out and scentwork, he`s very patient and focused. His favourite toys are little cat ones (dog safe ones obviously) and I hide those up for his games.