Fill a plastic pool (or dog-proof pool) with water and put some cups with kibbles in it in the water. Lots of cool fun! Do you have a pro-dog? Then put some kibbles in the water (if they float) and see if he can catch them!
Siuwkje helped really well with filling the pool with water by throwing out the hose about 30 times, but in the end it was filled with water. Yazoo even managed to catch floating cookies by sticking her head in the water until the bubbles came out of her nose. Noa tried it too but concluded that drinking the pool empty was not possible. She gave up and asked for my help. Koda didn’t like it at all. Getting wet for some cookies, no thanks.