Vivifying Snuffle Mat for Dogs, Interactive Dog Puzzle Toy for Boredom and Mental Stimulation, Enrichment Feeding Game Sniff Mat Helps Slow Eating and Keep Busy

They make some that have little flip covers they flip open to get access. There is a step up where you lock the drawer and they unlock it with their paws then pull the drawer open. Can’t find them on Amazon. Or something like this: https://www.amazon.com/Vivifying-Snuffle-Mat-Interactive-Stimulation/dp/B09WV4CJ8R/ref=mp_s_a_1_11